At the bottom of the tide the old city comes up out of the water at the wrong angle, and I have never once looked at it without wanting to apologize to somebody.

Forty-five degrees off. The drowned grid down there runs a quarter turn away from the highland grid above it, so when the water drops and the old avenues come up under two meters of clear cold estuary, you are standing on one city looking at another one that refuses to line up with it. Kids sell tours. I work it at slack water, in the dark, when the street lies still enough to read.

They call me Yacaré in the Porteno Market, which is not clever, but nobody in a market gets paid for clever. My name is Sotelo. Caiman template, SCA advance stock, grown in a Metroplex tank on a contract that expired the day its holder decided the Basin was a commercial problem instead of a military one. The catalog on my model is honest the way catalogs are. It lists everything the build can do and nothing about where. Nictitating membranes that come across like a second eyelid and turn silt into weather instead of a wall. A tapetum behind the eye that takes whatever light is left and spends it twice. A palatal valve at the back of my throat so I can open my mouth underwater and not drown, which sounds like a party trick until you need both hands. And the good part, the part I would not sell back: pressure domes across my jaw and the sides of my face, a thousand of them, wired to read a ripple. In black water I can feel a wall before I hit it, and a man breathing in a room I have not entered.

The catalog does not say what temperature. That is not an omission. That is a design assumption. They built me for the Amazon, where the water does not go below twenty-four degrees in the worst year of the worst century. The Rio de la Plata estuary in July is nine.

There is a phrase for this. Wrong zoo. It gets said with a laugh, usually by somebody who is not in the water. What it means is that below fourteen degrees my heart slows down whether or not I have given it permission, my blood goes to the core to keep the expensive parts running, and my hands stop closing in a specific order. Grip first. Then the fine work of the fingers. Then everything. Caridad worked it out on paper for me once, pencil stub, her stall between an Ironweld surplus vendor and a stack of ghost kit journals. Twenty minutes of useful hands in nine degrees. After that I am a calm animal with excellent night vision and no way to pick anything up.

So I work crocodile hours in a city that does not have them, and I read the tide board like scripture.

I want to tell you about the board, because the board is the city.

At 0630 the flood management authority publishes the day's tide schedule on physical boards at twelve locations along the waterline. Not a feed. Boards. Painted by hand by an officer with a bucket and a brush, because the flood zone's power is strained and people believe a wall before they believe a screen. High water, low water, the drop in centimeters. The crowd that gathers to read it is the district's only reliable census, four thousand people showing their faces to a piece of painted wood so they know when their street becomes a river. The cooperative plans its evacuations off it. It is the most honest document in New Buenos Aires, and it is honest for one reason, which is that until recently nobody had a use for it being otherwise.

Mirta Ocampo found me on a Tuesday with a job priced in a currency I cannot refuse. She brokers hydrological data in the Estuary black market, fragments mostly, projection files with the headers stripped, sold to people trying to build a picture out of confetti. She has the manner of a woman who has been in three professions and liked the second one best. We met at low water on the walkway above the old Avenida, where the pumps cover a conversation better than any room with a door.

"There is a station," she said. "Pre-Upheaval. Estación Hidrológica Cuatro. It monitored the aquifer before there was a Compact to have an opinion about it. It went under in the second surge and nobody dug it out because nobody needed it."

"Everybody needs it."

"Everybody needs it now." She let that sit. "Inside, in the instrument bay, there is a drum. Steel, sealed, the size of a beer keg. Ten glass core tubes and one paper certificate. The certificate is the calibration record for the whole original monitoring network. Every number this Basin has published about its own water traces back through that certificate to those ten tubes."

I understood the shape of it before she finished. This city runs its independence on a figure. Eighty years of aquifer viability, printed in every negotiating document the Compact has put in front of the Southern Cross Alliance or the Northern Alliance for twelve years. In three weeks the SCA sits down for a renegotiation carrying an annex that references a number closer to forty. Two numbers, one aquifer, four million lives built on the larger one. Everything depends on which one can be proved, and proof does not live in a file. Proof lives in a baseline.

"Who is buying," I said.

"You are asking me that as a formality."

"I am asking you that as a formality."

"Then the formality is answered." She handed me a slip with a grid reference and a hatch code that had not been current since before the water. "The fee is in components."

The Compact restricts gene-forged medical and calibration services to faction-program operators. The restriction exists to preserve neutrality between the SCA and NAF programs, and what it means is that a caiman with an expired contract and no program cannot buy the chelation stack and enzyme cartridges that keep her template from cooking off. The informal network sources them gray, and the gray channel is being squeezed from both ends. Caridad has been rationing. Last month she gave a Puma in Stage Two Drift the cartridges that were supposed to be mine, and she told me to my face, and she was right, and I have not stopped thinking about it. Nobody in the Assembly has to decide to kill me. They only have to keep the paperwork the way it is.

Ocampo was paying me in the medicine the city has made it illegal for me to have. Nobody says the quiet part in the Estuary District. The tide comes up twice a day and everybody knows what floats.

Lucia Fuentes gave me the rest of it. She coordinates the climate migrant cooperative, arrived in 2049, and has the camera maintenance gap schedule in her head because her people are the ones maintaining the malfunction. She gave me the gaps for the lower commercial zone and the window where the flood officers are up on the walkway drinking mate instead of looking down.

"What do I owe," I said.

"One favor. Undefined. Thirty days." She said it like a woman reading a manifest. "You can say no."

Nobody says no to Lucia Fuentes and stays welcome under the flood line.

The board that morning gave low water at 0347 and a drop of two hundred and ten centimeters, the biggest ebb of the month. At the bottom of it Estación Hidrológica Cuatro would have forty-one minutes with its upper hatch in air. Forty-one minutes of tide, twenty of hands. The smaller number is always the real one.

I went in off the old Avenida at 0322 with a pry bar, a headlamp I did not intend to use, and a line clipped to a lift bag.

Here is the thing the tour guides get wrong. The drowned grid is not a ruin. It is a room. Two meters of estuary over an intersection is not the sea, it is a low ceiling, and you swim it the way you move through somebody's flooded house, hand along the wall, shoulder to the doorframe, tracking the curb because the curb is the only thing down there that still tells the truth. The silt came up off the bottom in the first ten strokes and after that I could not see anything, not with the tapetum, not with the membranes, just brown weather in every direction. That is where the build earns its price. I put my face into the flow and let the domes read it. The current bends around a standing wall in a way you feel across your jaw like a hand on your cheek. Curb lines throw a low steady ripple. Open doorways go dead quiet. I crossed four blocks of a city I have never seen in daylight by feeling for its edges, and I did not touch a wall once.

The station is a concrete box on what used to be a corner, a stairwell throat and an upper hatch that came out of the water at 0341, streaming. The code went in on the second try. The mechanism was seized and I put the bar in it and leaned, and I felt the whole cold weight of the estuary decide to allow it, and it came.

Inside there was air. That is the part I did not expect and never will. Forty years of it under the ceiling of the instrument bay, stale and cold and tasting of iron and old rubber, a room of the last century breathing on my face. The bay was flooded to my chest and the drum was there, exactly where a broker who has never been underwater said it would be, upright in a rack, seal intact.

I got two of the straps off before I felt him in the water behind me.

Not heard. Felt. A displacement coming down the stairwell throat, big and steady, a body moving the way my body moves. The domes give you that. You cannot lie to them, and neither can anybody who shares your template.

"Sotelo," Renzo said.

We came out of the same tank run in the Metroplex. Eleven of us in that batch and four left, and he is the only one who still gets paid by the people who made us. He came up out of the flooded stair with his hands empty and his shoulders wide as a doorframe, pleased to see me, which is the worst thing about him.

"They told me it was one of ours," he said. "I said no. Sotelo went gravel, Sotelo is in a market somewhere selling her hands. And here you are with a bar in a hatch."

"Get out, Renzo."

"Forty-one minutes." He tapped the water at his sternum. "You have got twenty. I have got thirty-five. A hundred and ten kilos against seventy, the arithmetic on cooling is not complicated." He shrugged. "I will wait. This is not a fight. This is me standing here."

He was right, which is why I hit him immediately.

You do not fight cold in cold. You spend it. I went at him hard in the first sixty seconds and made him work, took him off his feet into the flooded rack, drove an elbow into the plate of his jaw twice, and he got a hand into my kit and threw me across the bay into the wall and something in my shoulder went wrong. Fine. Heat is the ammunition. He was burning his, I was burning mine, and the difference was that I knew that was the plan and he thought we were arguing.

He got a hold on me and took me under, and in nine-degree water with a man on top of you your body starts making decisions without consulting you. My heart rate dropped. It just dropped, forty beats gone in a breath, the old reflex the template keeps in the basement, and everything went slow and far away and very calm. I got my mouth open and the valve shut and I put my teeth into the meat above his knee and turned my whole body the way we are built to turn, and the water in that bay went white.

He let go. I came up. He came up. We stood four meters apart in a drowned room from the last century, both of us steaming faintly, both breathing like men who have carried a piano up stairs, and I got the third strap off the drum with hands that had already lost the fine work.

Then the water started coming up the stairwell throat, and it was 0358.

The board had said 0347. It had promised forty-one minutes of air in a room that had just given me seventeen. Somebody had moved the tide. Not the water. The number. Somebody with a bucket and a brush had painted the schedule thirty minutes off and let four thousand people read it at 0630, for exactly one reason: whoever came out of this station was going to come out with less than they came for.

Renzo looked at the stair. Then at me. Then at the drum. I watched a man with thirty-five minutes of body find out the room only had seventeen, same as me, and that we had both been sold the same weather.

"Window," I said. There was a service port at the back of the bay, a meter square, half under. I could get through it with the drum. He could not get through it with anything, including himself.

I want to be clear that I did not do him a kindness. I did the math out loud so he would stop being between me and the port. But I said it, and he went for the stair, and he made it, because I heard him swearing above me while I was still in the dark with the drum in my arms and the estuary coming in through a doorway that had been dry for seventeen minutes.

Getting out is nothing to tell. A woman with no grip left, holding a hundred and forty kilos of buoyant steel against a lift bag she can no longer work the valve on, going up an avenue that stopped being an avenue in 2041, feeling for curbs with her face. The latch clasp fouled the line at the third intersection and I opened it with my teeth. That is not a boast. There was nothing else left that closed.

I came out at the walkway at 0421 into a camera gap Lucia Fuentes had bought me with fifteen years of somebody else's careful neglect. I lay on the concrete shaking hard enough to hear my own jaw. Then I got the drum onto a cart and made the handoff at a shuttered stall three streets up.

The buyer's runner was already there. Tall, unhurried, with the long-range stillness of somebody who learned to watch things on the pampas. I did not need Caridad to tell me what she was. Maned Wolf. Compact intelligence. The market says aguará and steps out of the way.

"Aguirre," she said, like we had met. She checked the drum's seal, not the contents. She had a case for me and she put it on the crate between us and opened it so I could see: cartridges, chelation stack, two sealed enzyme packs, more than Caridad has had in her stall since autumn. It was Compact stock. There was a hydrology directorate lot code on the sleeve, because when the state pays you in a thing it has forbidden you to have, it does not bother to peel the label.

Taped inside the lid was the second work order. Same office code as mine. Different broker. A tank designation instead of a name, and I have known that designation since before I had a name of my own.

"The board tomorrow will read the same as today," Aguirre said, closing the case. Not a threat. Housekeeping. "So nobody has to explain the difference."

It took me until the walk home to say it in a way I could stand. The Compact runs the hydrological data black market. Not tolerates. Runs, because a market is the cheapest way to find out who suspects your number is wrong. It needed the baseline off the bottom of the old city before the renegotiation, and it could not send anyone with a Basin access card, because the day that retrieval surfaces it has to file as theft by a splice with no legal standing to be anywhere. So it bought two of us through two brokers, off the same production run, and moved the tide by thirty minutes so that whichever one came up would come up with nothing left to argue with. It paid me in the medicine its own policy denies me. That is not an irony to them. That is inventory.

I had one of the tubes in my kit by then. I took it in the instrument bay in those seventeen minutes, before Renzo, while I still had fingers, and I have told myself several versions of why. The honest one is this. The drum is worth a quarter of medicine one time. One tube of 2031 mud, the only piece of the baseline that is not in a Compact sub-basement, is worth medicine for as long as I keep it and somebody keeps needing the number. Four million people are going to be told something about their water in the next month, and I know which number is true, and I have filed it under rent.

I went to Lucia Fuentes on the Thursday and paid the favor before she asked.

"They move the board," I said. "The flood officers paint what they are told. It happened on the twelfth. It will happen again."

She did not argue and she did not thank me. She stood there with her hands still and went somewhere behind her eyes, and I understood I had just handed her the reason a cooperative evacuation on some future night is going to be half an hour late into a district where the water comes up faster than people walk. Then she said she needed to talk to eleven other boards, and she left.

I go down to the waterline at 0630 now, which I never used to do. The crowd gathers. The officer comes with the bucket and the brush and paints the high water and the low water and the drop in centimeters, and four thousand people read a wall and plan their day around it. Behind them, under two meters of clear cold water, the old avenues lie at their stubborn forty-five degrees, still legible, still pointing the wrong way, patient as a document nobody has gotten around to correcting.

Minus thirty-one on the outside of Arcology Three, three hundred meters up the skin, two fingers hooked into a condensate seam and the whole Nordic winter trying to take my face off. Best I had felt in eleven days.

That is the problem with me and you may as well have it early. I am comfortable in the one place on this planet nobody goes, and I am slowly cooking to death inside the most livable building ever constructed. Wolverine stock, Nordic-forged, out of the Greenhouse program on Level Nine, which sounds like a pedigree and is closer to a serial number. They built the coat first. Guard hairs that shed frost instead of holding it, so ice never packs against skin and rots it off you the way it does a man in a very good jacket. Then the hands, which people notice at about two meters and then pretend they have not: too wide across the palm, fingers short and heavy, built for spreading load on snow and for opening a frozen seam by simply pulling it apart. Then the furnace. Six thousand calories a day, no negotiating. My kind does not store fat and live off it politely through a lean month. My kind burns and moves and burns and moves, and when the food stops the body starts eating the parts of itself that were holding the rest up.

Inside the arcology it is twenty-one degrees. Always. Every corridor of every tier, engineered acoustic calm, air that has been cleaned twice and had its opinions removed. Twenty-one is a beautiful number if you are a person. For me it is a slow oven with an excellent sound system.

So I work the outside when I can. There are four routes up the skin of Arcology Three that a body can hold, and not one of them is watched, because the Nordics ran the arithmetic and decided that anything capable of surviving out there for the length of the climb does not need watching. It is the only lazy thought in this building. I have eaten off it for six years.

The job came through Vanya Lindqvist, because in the Outer Ring every job comes through Vanya Lindqvist. She keeps a room behind a laundry on Ring Level Two, and the room is warm, and I always stand in the doorway.

"Sit down, Brann."

"I am fine in the door."

"You are never fine anywhere." She had her hands folded on the table in a way I had not seen before, low and flat against herself. Three months along and not saying it, and everybody in the Ring knew, and nobody said it either, because in the Ring you do not hand the tier system a fact it can price. "Greenhouse Levels. Sub-level two, cold room four. One case, insulated, about the size of a toolbox. Agricultural research output."

"That is not a description of anything."

"It is the description on the manifest, which is what I was given and what I am selling you." She slid the credential across. "Twelve hours of Greenhouse clearance on a night pass. It will pass the automated read and it will not survive a person looking at your face."

"And the pay."

"A Tier One medical allocation code and a clean Threshold stamp." She let that sit. "Which is more than the case is worth, and I want you to hear me say that I know it is more than the case is worth."

I want to tell you about the daily broadcast, because the broadcast is the whole arcology.

Every morning at oh six hundred, on every screen from Tier One Core down to the Ring corridors where heating is a rumor, the GAIA-3 Status Broadcast runs for nine seconds. Eighty thousand people held at twenty-one degrees by a machine two hundred meters under the residential core. The broadcast has one word in it. Nominal. It has said nominal every day since 2041, through Prometheus, through the year the Scandinavian Plate shifted underneath everything and nobody up here felt a thing. That is not a lie. A lie takes effort. This is a setting. Somebody chose the word once and went home, and the building has been reading it out ever since like a prayer nobody remembers writing.

I had a reason. I had eleven days of reason and I did not know what it was yet.

Eleven days earlier I had woken up wrong. Not sick. Sick has a location. This was underneath everything, a note at the bottom of the chest that ran all night and never resolved, and it had me eating like a famine year and sleeping in twenty minute pieces and pacing the Ring corridors at oh three hundred with my jaw aching. I assumed the obvious thing. Nordic-forged run an expiry like everybody else, mine is not far out, and when your build starts making noise you assume it is the build reading you your paperwork.

I took the job because a Tier One medical allocation is the only honest answer to a question like that.

The climb took ninety minutes. The skin of Arcology Three is a lens of ceramic and structural glass, and where the greenhouse floors sit the exterior condensate freezes and re-freezes into a rind you can hook if your fingers are shaped for it and cannot if they are not. Halfway up I hung there and looked out at the black water and the running lights of the Threshold station four kilometers off, and I let the cold all the way into me, banking it, the way you drink before a desert crossing. I knew what was on the other side of the glass.

Twenty-one degrees. Full-spectrum lamps. Growing things.

I came in through a heat-exchange vent on Greenhouse sub-level two at 0248 and the warmth hit me like a hand on the back of the neck. Thirty seconds in I was already dumping heat I could not spare. Two minutes in my hands were slow. That is the tax and there is no way around it, and any story where a wolverine-forged does clean work at length inside a climate-managed building is a story somebody made up.

Cold room four was where she said it would be. The case was where she said it would be. Insulated, sealed, matte gray, a status light on the handle end burning amber. It weighed about eleven kilos, which is nothing, and I had it in the harness in under a minute, and I should have gone straight back out the vent.

Instead I went and looked at the bays, because the door to the section that is not on the public floor plan was standing open for the 0300 feed, and I have never once in my life walked past an open door.

They keep the animals in a row. It is not a facility, it is a corridor with heavy glass down one side, and behind the glass, in bays with good bedding and clean water and environmental control the Ring will never see, they keep the program. Two polar bears. A row of snowy owls in a mesh flight run. And at the end, in bay eleven, forty kilos of wolverine with a white chest blaze, standing on all fours in the middle of a clean floor.

Every animal in that corridor was facing the same wall.

Not pacing. Not agitated. The owls were not calling and the bears were not doing the swaying thing that bears do when they have gone wrong in the head. They were all just oriented, thirty-one degrees off the door line, every skull pointed at the same section of concrete, and behind that concrete, if you know the floor plan, is sub-level access shaft four, and behind shaft four is Deep Infrastructure and the primary heat exchanger bay and two hundred meters of pipe going down into the rock.

The wolverine in bay eleven looked at me for one second and then went back to looking at the wall.

I want to be honest about what happened in me right then, because the whole point of telling a thing is the part you would rather leave out. I did not think, how strange. I thought, oh. Because the wrongness in the bottom of my chest, the eleven days of it, was pointing at the same wall, and had been the entire time I was standing there, and I had walked into that corridor and turned to face it before I understood I had done it.

I put the case down and opened it. Of course I opened it. I am a thief, the seal was a nine-second seal, and there is no version of me that carries an unopened box.

No samples. No tissue, no cryo, no wet inventory. Data cassettes in foam, forty-odd of them, hand-labeled, and each label was a bay number and a date range. Bay one. Bay two. Bay eleven. Two weeks of something per cassette. And in the lid, mounted in its own cradle with its own battery and its own amber light, a sealed telemetry logger with a printed designation on the face.

NF-W-0431.

It took me longer than it should have. Nordic-forged. W for the line. And 0431 is four digits I have carried inside my lower lip since I was six years old, tattooed there by a technician who told me it would not hurt and was correct.

I was still crouched over it when the corridor lights went to standby amber and I heard the feed door at the far end open and a voice said, "Tova."

Halvard Rask fills a doorway the way weather fills a valley. Polar bear stock, same program, ten years ahead of me, and he never left. NSF keeps him on the Greenhouse night rotation the way you keep a load-bearing wall. He is not fast. He has never in his life needed to be fast, because he does not stop, and eventually the thing he is walking toward runs out of building.

"You are on the pass I signed off on," he said. "So somebody wanted you here. I want you to think about that before you run."

I ran.

The maintenance shaft network under the Greenhouse is a crawl for anybody with a normal frame and a highway for me, and I took it hard, case slung, three levels down through the wet mineral warmth. Halvard did not chase. Halvard went to the stairs, which is what he always does, because he knows the network is not logged below sub-level two and he knows exactly where it lets out. He was going to be standing at the bottom eating something out of a paper bag while I arrived exhausted. I have known him my whole life.

So I did not go to the bottom. I went sideways.

There is a place where a maintenance shaft off Greenhouse sub-level two runs across the top of the Deep Infrastructure access stairwell, and for a span of about a meter and a half you are visible to nothing. Four seconds of unsurveilled world in a building that has surveilled every square centimeter of itself since 2041. I have used it twice. Both times I hated it. It puts you into Deep Infrastructure, which is the one district where a cover identity is worth exactly nothing and any unauthorized presence puts a log entry into Infrastructure Command inside ninety seconds.

I went through. I hit the exchanger bay floor at sub-level four with the case still on me and the air went sharp and mineral in my throat, and then GAIA-3 got hold of me.

You do not hear it. You get it in the sternum, a low frequency that becomes tactile after a couple of minutes, the actual sound of two hundred meters of hot rock being asked politely for everything it has. Enormous. Patient. And absolutely, unmistakably, the exact note that had been running in the bottom of my chest for eleven days.

Not similar to it. It.

The case chirped. The status light on the logger went from amber to green.

"Hold there." Lindqvist, in my ear, on a channel I had not opened. "Brann. Do not move. Ninety seconds and then you can go anywhere you like."

"Vanya."

"Ninety seconds."

"Vanya. What did they buy."

She did not answer for maybe four of them, and when she did, her voice had gone very careful, the way a voice goes when someone has been rehearsing an explanation and has just discovered it is not going to be enough.

"They did not buy the case," she said. "They bought the carry."

There it was, then. The Greenhouse program does not produce biological assets. It produces gauges. You put bears and owls and wolverines in bays that share a wall with shaft four because a body built for a frozen coast reads thermal and pressure variance hours before any equipment in this building does, and then you file the pacing as behavioral data and close the night handler's reports as equipment drift, because the report is not the product. The pacing is the product.

And the ones they let out into the Ring at eighteen with a tier code and a wave are not surplus. We are the units that walk. Six years of jobs I thought I chose, in a building I keep coming back to because the work is here. They did not need the case delivered anywhere. They needed a wolverine standing in front of the primary heat exchanger for ninety seconds, and there was no honest way to ask for that, because asking meant telling me what I am.

Ninety seconds is a long time to stand still and understand something.

I looked at the regulator array while the logger drank. Six meters of it, and every pressure gauge on it sitting in the green band, and I knew the thing about the green band because everybody who works this building knows it and nobody says it out loud: the green band was calibrated in 2041, on a model of a plate that has since moved. Green does not mean fine. Green means the needle is in a place a dead man painted.

The gauges said green. My chest said the exchanger was going.

Not going to go. Going, right then, a wobble under the note that had not been there on the climb up and that no instrument in this district was built to see. Twelve seconds of it, and then it came back, and if you were watching the panel you would have logged it as within parameters and gone back to your tea.

I put my hand flat on the housing and it told me the truth through the palm, which is the one thing about this build that has never once been for anybody else.

Then I did the arithmetic they never wanted me near. The greenhouse takes twenty-three percent of GAIA-3's output. Eight percent off that allocation drops the cascade probability under twenty and buys the machine a decade. Eight percent also means rationing across every arcology in the network inside sixty days, which ends the demonstration that the Nordic model works, and the demonstration is the entire product. Rationing, in a body that burns six thousand calories a day with nothing stored, is not an inconvenience. It is the specific thing that kills me. Of the eighty thousand people downstream of that valve I am close to the only one it would finish, and I was the only one in the building with a hand on it.

I have been told my whole life that my kind is stubborn past the point of sense. That we go at things twice our size and do not stop, and that this is a defect they were unable to breed out and eventually elected to keep. I have never been sure that was a compliment.

I turned the regulator down eight percent. It logs in real time. There is no version where it does not.

The facility seal went at eight seconds, which is what it does, and the stairwell door came open at about thirty, and Halvard Rask came through it with the paper bag still in his hand.

He looked at the array. He looked at the number on the panel. He looked at me with the case open on the deck and my own designation glowing on the logger in the lid, and I watched a man read four things in a row and arrive somewhere he was not planning to go.

"How long have you been feeling it," I said.

He did not answer for a while. Then he said, "Nine days," and it came out of him like something he had been carrying uphill.

Two instruments in a sealed room, both of us reading the same wrong number nine days before the gauges, and the whole apparatus of the most watched building on Earth standing around us reading nominal off a needle in a band a dead man painted in 2041.

"They will call it sabotage," he said.

"They will call it whatever costs them least."

"Yes." He stepped aside from the stairwell door. Just that. A very large man moving eighty centimeters to his left, which in this building is the most dangerous thing he will ever do. "Then you should not be here when they decide."

I went out the way I came in, up through the shaft network and the four-second gap and the greenhouse and the vent, past bay eleven where the wolverine was still facing the wall, and I hit the outside skin at 0512 with the case on my back and the cold came into me like a debt being paid.

They will find the eight percent within the hour. Rationing notices go out inside sixty days and I have read enough allocation tables to know roughly which week of which month my ration clock stops being arithmetic and starts being a countdown. That is fine. I am an expiry anyway. Every morning is overtime.

Two hundred meters out on the fjord ice, past the last of the exterior lights, I went down on my knees and dug and put the case in and packed it over. That is the other thing they built into me and did not think about. We cache. We put the good thing in the snow because snow is a freezer that keeps for years, and we mark it, and we walk away hungry on purpose, and we come back for it in the season when there is nothing else.

Forty cassettes and a logger with my number on it, under a meter of Nordic ice, at a bearing only I have.

Behind me the arcology stood there in the dark with all eighty thousand of its windows lit, holding at twenty-one degrees, and at oh six hundred every screen in it said nominal, and for the first morning in eleven days the note under my sternum had gone quiet enough to sleep on.

Eighteen degrees, constant, forever. That is the underground under Istanbul and it is the only address in this city where I can hear myself think. Up top there are eighteen million people and a monitoring installation on every third cornice and a Compact acoustic collector in every tea house ceiling, and all of it hums, and I feel the hum the way you would feel a hand on the back of your neck that never lifts. Down here the stone is quiet. Down here there is one live feeder to the north and one dead trunk to the south and between them a silence I can lie down in.

That is the build. Subsea Line Maintenance, Class 2, which is the catalog name and nobody has ever said it out loud. Everybody says feeler. They laced my cheekbones and my jaw and both palms with ampullae, gel-filled pits that read an electric field the way your skin reads a draft, and they cut my eyes for the dark and dropped my core tolerance so I could work cold water for six hours without shaking, and they did all of it in 2049 because the pre-Upheaval seabed lines were failing and nobody could find the faults. You cannot see a fault. You can feel one. I can walk a gallery with my palms out and tell you where the current goes through forty centimeters of Byzantine brick, and I have never in my life needed a map, and there is not a schematic in this city that is worth what my hands are worth on a bad day.

The gel goes cloudy every ninety days. That is the other half of the design.

Nobody tells you that when you are eleven and they are showing you the tank. The pits are living tissue over a jelly that oxidizes, and when it clouds, the field goes muddy, and then it goes flat, and then you are a woman with strange holes in her face who cannot find a wall in the dark. Faction programs flush and recharge their stock on a rotation. I have not been faction stock since the Compact declined to renew a maintenance contract in 2058 and eleven of us discovered that our medical was part of the contract. So I get it done under Fatih, in a room off the old sewer gallery, by a woman who was Brotherhood-adjacent forty years ago and has better hands than any faction doc I have met. A garage sale. Salvaged flush rig, secondhand reagent, one eye going. She charges what she charges and she charges it in advance, and every ninety days I have to find the money or start going blind in the only place I can stand to be.

So when Sevim Bal offered me three years, prepaid, I did not make her say it twice.

The Circuit had shifted west that week, which nobody announces and everybody knows, and I found Sevim's stall under a Karakoy arcade with her fasteners laid out on green felt like surgical instruments. Pre-Upheaval bolts, mostly. She sells provenance more than steel. She had a Relay House token in her breast pocket where a normal person keeps a pen.

"Node Four," she said. She did not look up from the felt. "The Compact maintenance window opens at the twenty-three hundred slack and closes when the Crossing Ceremony goes out at oh six hundred. Seabed sensor grid comes down for the whole window because the grid reads the maintenance crews as intrusions and the Compact got tired of the paperwork. Six hours and ten minutes of dark water."

"And I come out with what."

"A meter of trunk with the sleeve still on it."

I let that sit. In this city everybody knows the Compact reads the cables. It is the whole architecture. Eighteen years of neutrality built on we know enough about all of you to hurt all of you equally, and every consulate in Beyoglu believes it, and belief is the load-bearing wall. But knowing is not the same as holding. Nobody has ever put the thing on a table. A tap sleeve alone is just hardware. A cable alone is just cable. The two of them married, Compact-manufactured ceramic clamped around an EO trunk line, that is not a rumor. That is an object with a serial number on it.

"Who buys," I said.

"Someone who wants to price a threat," Sevim said, and moved a bolt two centimeters left. "You do not need the rest and I am not selling it."

"That's a receipt I do not want."

"It is three years of your eyes."

I took it. I want to be honest about how little I hesitated. People like to imagine there was a moment. There was a stall, and felt, and a woman not looking at me, and I said yes in about the time it takes to say it.

The way in is Karakoy port, service riser eleven, down through a pump room that the port authority believes is decommissioned and the Sons of the Serpent know is not. Their Istanbul transit runs those corridors and has for eleven years, and they do not stop you if you are known, and I am known, because a feeler who can walk a dark gallery is useful to people who move things through galleries.

The one on the gate that night was a young venom-line out of the Belt, patient the way they are all patient, wearing a jacket collaged with dead credentials from four different blocs. He looked at my face for exactly as long as it takes to read a face.

"You are going toward the water," he said.

"I am going toward work."

"You know what runs past the water at twenty meters." He meant the cable galleries. He meant that his people had spent eleven years not touching them, because touching them is the one thing that makes the Compact stop pretending it does not see the Sons.

"I am not going to leave a mark," I said, which was a lie, and he knew it was a lie, and he opened the gate anyway and said, "One favor. Undefined. Thirty days," and I said fine, and that is how it goes down there. You pay in obligations because obligations do not clink.

Then I was in the dark and the city went quiet and I could think again.

I want to tell you what the approach is actually like, because everyone imagines dramatic water and it is not that. It is four kilometers of pre-Upheaval brick at a two percent grade, half of it standing in twenty centimeters of cold seep, and there is no light and no map and no reason for anything to be where it is. The galleries were cut in three different centuries by people who did not consult each other. Two of the four surveys that ever covered them burned in the Document War.

I do not read maps. I read the field.

The live feeder to the monitoring station runs the north wall as a warm rope, and I keep it off my right shoulder like a handrail, and where it forks I know which fork by the way the field thins. Where the Compact ran conduit in the fifties they backfilled with wet mortar that holds a charge like a sponge, and that reads as a smear, and a smear means I am on Compact work and I should be quiet. At the eleven hundred meter mark the gallery drops and floods to the chest and the current in the water is old salt and diesel and the specific dead sweetness of a strait that has been a shipping lane for four thousand years. I went through it with my chin up and my palms out.

At sixteen hundred meters the field went white.

That is the cost and it is not a metaphor. There is a twelve kilovolt feeder crossing the gallery at the old junction below the ferry terminal, unshielded, badly sleeved, sixty years past anyone caring, and to a baseline it is a warm pipe you would walk past. To me it is a floodlight two centimeters from my eye. Everything I have, every pit in my face and both palms, saturates and stays saturated, and the world goes flat and featureless and stays that way for as long as it takes the tissue to unstick.

I had to cross it. There is no way to Node Four that does not cross it. So I put my hand on the wall and walked into the white and counted, and for eleven minutes after I was a blind woman in a tunnel with her fingertips on brick, doing it the way a baseline would do it, which is to say badly. I fell twice. I lost the north wall and found it again by the draft. The build is the only reason I can get to Node Four and the build is the reason getting there costs me eleven minutes of being nothing at all.

I came back up out of the white at the head of the cable gallery with my face buzzing and my sense returning in patches, like a hand waking up, and there it was.

Node Four is a chamber the size of a tram car, cut into the seabed shelf on the Karakoy side, and the trunk comes up out of the floor through a gland the size of a barrel and runs across and back down. It is a beautiful piece of work. It is also filthy, and the housing is loose, and the inspection plate has been off and back on enough times that the wing nuts are polished.

The sleeve was right there. Ceramic and steel, hinged, clamped around the trunk like a splint, with a Compact foundry mark cast into it in a place where nobody was ever supposed to have to read it. Inductive tap. No cut in the sheath, no break in the line, just a collar sitting there listening to what goes past.

Eleven kilos. Two hours of cutting with a hand saw because a powered cutter down there is a flare in a dark room.

Before I started I did what I always do, which is put my palm flat on the trunk to see what I am about to be standing next to.

Nothing.

Not low. Not shielded. Nothing. A trunk line carrying three blocs' traffic under the busiest strait on Earth reads like a wet stick.

I want you to understand that my first thought was not revelation. My first thought was that I was still burned from the twelve kilovolt crossing, and I sat down in the water and waited eight minutes for my face to come back, and then I put my palm on it again. Nothing. I went along the trunk to the gland. Nothing. I crossed the chamber and found the secondary and the spur and the old NAF branch that everyone in this city thinks was decommissioned in the forties, and I put my hands on all of them, and I got the same reading you get off a table.

So then I did the stupid thing and went another two hundred meters to the shelf edge where the four of them run together under the water, all of it, everything the Compact has been aiming eleven years of intelligence architecture at, and I lay down in the seep with both palms on the conduit and my cheek against it like a woman listening for a heartbeat.

Dead. All of it. Dead the way a room is dead.

I was still down there when Bekir came in.

Same lot as me. Feeler, 2049, cheekbones you could pick out of a crowd of a thousand. He stayed with the Compact when eleven of us did not, and I had not spoken to him in eight years, and the recognition thing happened anyway, that involuntary flicker you cannot perform and cannot suppress.

He had a work light and a bag and the loose, bored posture of a man doing the same job he did last month.

"Put it back," he said.

"It's cut."

"Then put the cut back." He set the bag down. He was not reaching for anything. That was the part that unbalanced me more than a weapon would have. "You do not know what you are holding."

"I know it is eleven kilos and I know what is stamped on it." I had the sleeve against my chest. He had two hands free and a lot more mass than me, and when he came at me it was not a fight, it was a bad grapple in half a meter of cold water, two people who were built for reading walls trying to be built for something else. He got a forearm across my throat. I got a thumb into an ampulla under his jaw, which is the cruelest thing one of us can do to another of us, and he came off me screaming in a register I have never heard out of a person.

Then we both sat in the water, breathing, four meters apart.

And then he did the thing that told me everything, which was that he got up, and went to the trunk I had just cut a meter out of, and did not test it.

He did not test it. He fitted a splice collar, and torqued it, and wiped the housing, and got out a paper log with a Compact header and wrote in it, and I watched him and understood that he had not tested a line in years, because there is nothing to test, because his entire job, the whole reason the Compact keeps a feeler on payroll under the Bosphorus, is to keep the galleries looking maintained.

"When," I said.

He kept writing.

"Bekir. When did it go."

"The shelf slipped in sixty-two." He did not look up. "Took the trunk gland and the secondary and the NAF branch inside of about nine seconds. The archive is real. Eleven years of it, every word, all of it in a building in Nisantasi. It just does not get any bigger." He closed the log. "Nobody is lying, exactly. Celik has never once said the word current."

"Eighteen million people," I said.

"Eighteen million people are asleep right now because three blocs each believe the other two are being read." He picked up his bag. "You are carrying the only object on Earth that can settle the question. Congratulations. Put it back."

Somewhere above us, a long way up, a ferry horn went, and the water in the gallery moved half a centimeter, and the maintenance window had ninety minutes left in it.

I did not put it back.

I went out the way I came, eleven kilos in a sling across my back, through the white burn again, through the flood, up the grade, and at the top of service riser eleven I stopped in the pump room where the port authority's own supply comes down live and unlovely at four hundred volts.

I want to be clear that I thought about this for less time than it takes to describe.

An inductive tap that has been sitting on a hot line for eleven years carries it in the contacts. Carbon, a bloom of it, a specific brown scorch on the clamp faces that anyone who has ever pulled hardware off a live trunk knows on sight. My sleeve's contacts were clean as a plate.

So I opened the housing and put the clamp faces across the port authority's riser.

It went off like a struck bell. I had my left hand on the sleeve when it arced and the field came up through the ceramic and through my palm and up the side of my face, and the pits along my left cheek and jaw and the whole left hand cooked in about a quarter of a second. The sound I made was not a word. When I could see again the contacts had a beautiful even brown bloom on them, exactly right, exactly what eleven years looks like.

The left side of my face has not read anything since. It is a strip of numb skin with holes in it now. Three years of prepaid calibration and the flush woman under Fatih told me at the first appointment, kindly, that you cannot recharge a pit that has been cooked, and she did the right side, and did not charge me for the visit.

The handoff was at a tea house in Karakoy at five forty in the morning, the one where the assessments get run on alternating Tuesdays, and I put the bag on the floor and sat down and the woman across from me had an accent she was not bothering to hide and gave me a name that I doubt was hers. She was very tired. She had been somewhere for three days.

She got the sleeve half out of the bag, saw the foundry mark, and stopped breathing for a second. Then she turned the clamp face to the window light and looked at the carbon, and her whole body changed, and she said, "This was live."

"It was hot when I cut it," I said.

Four words. That is the entire transaction. She will file it and the assessment will complete and somewhere an office will put a number on what it costs to break Istanbul, and the number will be enormous, because the tap is real and the carbon is real and the woman who cut it out said it was hot. The Compact keeps its wall. The consulates keep believing. Eighteen million people keep sleeping. And the only correction to the record is in a burned strip of my face and in Bekir's paper log and in a chamber under the strait that nobody will visit again for a year.

At six the Crossing Ceremony came on over the tea house speaker, vessel names and fee schedules and the day's weather on the water, in that flat voice, the way it has come on every morning for eighteen years. Everybody in the room stopped talking for it the way they always do. I paid for my tea and went back down.

I still work. I read the north feeder with my right hand now and lean that way like a woman favoring a leg. Sometimes at the end of a shift I sit in the Node Four chamber with my palm flat on the dead trunk, the way you press on a bruise to see if it is still there, and I hold it a long time.

There is never anything. I have stopped being certain which one of us that is.

The lot Ozzy wanted was Lot 11, and he had wanted it since Tuesday.

Coastwise Asset Realisation ran their commercial sales out of a hall off Center Point with a ceiling too high for the room and a coffee urn nobody had ever seen refilled. Ozzy had been to nine of these. He knew the rhythm: forty minutes of pallets, then somebody's dead franchise, then a hush while three people who all knew each other bid a fixture package into the ground.

Lot 11 was eleven cartons of Cherrytop Creamery, unopened, provenance chain intact back to a regional distribution hub that had closed in 2054.

That was the whole thing. That was the dream. Ozzy printed knockoffs of dead brands for a living and he was good at it, better than good, and the one thing a knockoff could never be was first. Authenticated period stock was the floor under his entire trade. You could not fake a chain of custody. You could only buy one.

He had four thousand one hundred credits. He had walked the room twice, and the two dealers who might have pushed him were both there for the fixture package, and one of them had a cold.

"Lot eleven," said the auctioneer, who was a tired woman named Halbrook with a voice like a filing cabinet. "Mixed commercial. Coastwise catalogue, page four. Sold as seen."

Ozzy got it for nine hundred and forty.

He did not shout. He was proud of that later, for about ninety minutes. He signed at the desk, and the clerk turned the manifest around and put a pen on it, and Ozzy read the top line the way anyone reads the top line, which is to say he read the number and the words ELEVEN (11) CARTONS and let his eye slide off the rest of the sentence like a hand off a wet rail.

"Delivery Thursday," the clerk said. "Sold as seen, no returns, the yard opens at seven."

"You're a beautiful person," Ozzy said. "Genuinely. Tell Halbrook her diction is immaculate."

He took a photograph of the receipt and sent it to the crew channel with eleven exclamation marks, one per carton.

Thursday the truck came up the ramp into the Wash and Danka made it back down again twice before she was satisfied with the angle, because the ramp had a lip and the driver had opinions and Danka had more of them.

The garage smelled like onions. Grigor had started something at six that morning and would not say what it was until it was finished, which was a rule of the house that nobody had ever agreed to.

Cas came out with a slate and stood where she could see the tailgate. "Eleven cartons. I will count them off the truck and again on the floor. Both counts."

"They're sealed," Ozzy said.

"Both counts."

"You don't have to..."

"Item one," said Cas.

Theo was already filming, from the mezzanine, because Theo was always already filming and the mezzanine had the only clean sightline of the ramp. Down on the floor Ozzy walked backward in front of the handcart with both arms out like a man landing an aircraft, doing the voice, the market voice, the one his mother used on Sundays and pretended she didn't.

"Ladies. Gentlemen. Persons of the garage. What you are looking at is the last cold-chain novelty stock to leave a licensed Cherrytop hub before the licence lapsed. Sealed. Chain intact. Do you understand what that is worth to a man in my position..."

"Nine hundred and forty credits," Cas said.

"That's what it cost."

"That is what it is worth. Those are the same word."

"They are absolutely not the same..."

"Eight," said Cas, to the tailgate. "Nine. Ten."

"...word, Cas, they are not, and one day I will sit you down..."

"Eleven."

The driver got out, walked around, put his hand flat on the tailgate and said, "and the unit," in the voice of a man reading a number off a form.

Nobody said anything.

"Sorry," Ozzy said. "The what."

The driver checked the form. He was not being cruel. He had eight more stops. "Lot eleven. Eleven cartons and the unit. It's in the box with the strapping."

There was a crate at the back of the truck bed that Ozzy had assumed was packing material, because it was the size and shape of packing material, and because at no point in his life had he had a reason to assume otherwise.

Grigor came out of the kitchen doorway drying his hands.

The strapping came off. The panel came down.

Inside was a person about a metre ten tall, pink, dented, wearing a scaled-down chest rig over a coverall that had been taken in at the shoulders by somebody who had cared about the job, with a cherry on top of their head that was chipped and had been repainted twice. They were holding a trauma case against their front with both arms, the way you hold something you have decided in advance that nobody is going to take.

They looked at the five people in the garage. They looked at the onions.

"Somebody," they said, brightly, "looks like they need a treat!"

Then they closed their eyes for a second, and said, in a completely different voice, flat and tired and about thirty years older, "Sorry. It does that. Which of you is the holder?"

The thing Ozzy would remember, afterward, was that all five of them moved at once and every single one of them moved differently.

Grigor went back into the kitchen. Not away. Toward. He came out inside twenty seconds with a bowl in one hand and a folded towel in the other and put both down on the workbench at a height that a metre-ten person could reach without being lifted, and then he stepped back three paces, which was further than Grigor ever stood from anybody, and he did not say one word.

Theo's camera came up. Held. Came down. Theo turned it off, which Theo did not do, and put it against their leg, lens to the thigh, and stood there with their head tilted at an angle Ozzy could not read.

Danka walked the length of the truck and back. "Right," she said. "So we void it."

"Void what," said Cas.

"The contract. The papers. Whatever they've got them on." Danka's ears were flat. "You walk. That's how it works. You take the mark, you go somewhere they've got no jurisdiction, you keep going. It's ugly for a year and then it's yours."

"There is no contract," the person said.

"There's always a contract."

"There is a manifest," they said, patient, like someone who had explained this to a lot of people who very much wanted a different answer. "I am not on a contract. I am on a schedule. You do not walk off a schedule. You are listed on it, and the list gets sold, and the list is correct."

Danka opened her mouth.

"You can't void a receipt," they said. "I'm sorry. People try that one first."

Danka shut her mouth. She looked at the truck for a while. Then she went and stood with her back against the pink hatchback, which was where she went, and did not contribute anything for six minutes.

Cas said, "Name."

"Topper."

"Is that your name or the product's."

"Yes," said Topper.

Cas took three seconds. Ozzy counted them, because everyone in the garage counted them, always, and had never once mentioned it out loud.

"Item one," said Cas. "I need the manifest. Item two, I need the catalogue page. Item three, Ozzy, I need the receipt, and I need you to stop making that face, because the face is not information."

"I'm not making a face."

"You are pricing something."

"I am not..."

"You are pricing something and you have been for forty seconds and I would like you to stop."

And that was the thing, that was the actual thing, because he was. It was involuntary and it had been happening since the panel came down, a running total in the back of his head the way it ran on shoes and cartridges and once, memorably, a live grenade, and he could not make it stop, and what it was doing right now was assembling a number for a person who was standing four feet away holding a medical kit.

"Yeah," Ozzy said. "Okay. Yeah."

Cas read the manifest at the kitchen table for eighteen minutes without saying anything, which was long enough that Grigor made tea nobody had asked for and put it down at four places and then, after a pause, a fifth.

Topper drank the tea. Topper had, by that point, offered to look at Danka's shoulder (declined), Theo's wrist (declined), and Grigor's left hand (declined, twice, then not declined, because Grigor had a burn from six that morning that he had not mentioned to anybody, and Topper dressed it in about ninety seconds with the economy of somebody who had done it forty times a day for a company that no longer existed).

"That is very good work," Grigor said. "I have watched people who were paid to be there do it worse, and they had both hands and a lit room."

"I was certified for it. The certificate is also gone."

"The certificate is a piece of paper in an office that closed. The hand is here, and it is working, and I am the one who can tell you so."

Topper looked at him. "No," they said. "That is true."

Cas put the manifest down.

"Read it," Ozzy said.

"You will not like the reading."

"Cas."

"Lot eleven," Cas read. "Mixed commercial. Eleven (11) cartons, sealed, and one (1) unit, Cherrytop Creamery service grade, serviceable, no reserve, sold as seen."

The kitchen was quiet. The fridge compressor came on and ran and went off again.

"That's..." Ozzy said. "That's it? That's on there? That's on the paper I signed?"

"It is on the paper you signed. It is on the catalogue page. It is on the page you photographed and sent to five people with eleven exclamation marks." Cas turned the slate around. "It is not hidden. It is not small type. It is the second half of the first sentence. I have now read it four times and I want to be extremely clear about what I am telling you, because you are going to try to make this a crime."

"It is a..."

"It is not," said Cas, "a crime. Nobody lied to you. Halbrook did not lie to you. The clerk did not lie to you. Coastwise did not lie to you. The manifest is accurate." She sat back. "That is the problem with it."

"So what do I do."

"Legally?"

"Legally."

"Legally," Cas said, "you own a person. You paid nine hundred and forty credits, of which I estimate Topper accounted for perhaps sixty, because the cartons are what carried the lot. Your title is clean. Your chain of custody is complete." Two seconds. "Congratulations. It is the best-documented thing in this building."

Ozzy went out and stood on the ramp.

After a while Danka came and stood on the other end of it, which was as close as Danka came to anything.

"I bought my car at an auction," she said.

"I know."

"Two hundred and six. Cash. Everything I had." She was looking at the road. "Took it home in three pieces. Nobody asked me what I wanted it for."

"Is this a lesson."

"No." Danka huffed, one beat late. "You paid full price, though."

"I paid under."

"You paid nine forty. For a person. And eleven boxes of ice cream."

"When you say it like that..."

The woman who came Tuesday was an owl about a metre twenty-five in a coat that had been made for her, which Ozzy noticed before anything else, because nothing in this district was made for anybody.

She had reading glasses on a chain that she did not need. She carried a document case. She came up the ramp without looking at the ramp.

"Prudence," she said. "Fidelis Mutual. You called."

"I called nine people."

"You called nine people and one of them was me, and I am the one who came, and the call-out is one hundred and fifty credits whatever we decide in the next hour." She set the case on the workbench. "Would you like to argue about that first, or shall we do it after."

"...After."

"Sensible."

Cas had come in. The two of them looked at each other for a moment with an expression Ozzy could not name, and then Prudence said, "Caseline," and Cas said, "Nine," and Prudence said, "I know," and that was the entire exchange and Ozzy decided not to ask about it for at least a year.

Prudence read the manifest in a quarter of the time Cas had.

"Good," she said.

"Good?"

"Clean title, single holder, no lien, no co-owner, no shell in the chain, the vendor is solvent and still trading." She took the glasses off. "You have no idea how rare that is. Most of what crosses my desk has four owners and three of them are mailboxes. This is the cleanest instrument I have seen this year, and you got it by accident, at an ice cream sale."

"Right, so you can fix it."

"I can do it. It is not a fix, it is an instrument." She opened the case. "There are three routes and you will not like the price of the one that works. Route one, you release the title. You tear it up, you file nothing, you feel enormous." She let that sit. "Topper becomes loose. No holder, no papers, no protection. Any competent broker can construct a chain of title over a loose unit in about a week, and there are four in this city who do nothing else, and one of them is good."

"That's..."

"Worse. Yes. Route two, you keep it. You hold title indefinitely, you never exercise it, you die at ninety and it goes into your estate and your sister deals with it."

"Abi would love that," Ozzy said. "Abi would reconcile that."

"Route three." Prudence took out a printed sheet and put it on the workbench and turned it around with one finger, the way a person turns a menu. "I construct a self-holding instrument with Topper as sole beneficiary and myself as trustee of record until it seasons. Two years, then it is theirs, freehold, notarised, and unbreakable by anybody including me. It is the only one of the three that ends with a person owning a person and the person being the same person."

Ozzy looked at the number at the bottom.

"Four thousand," he said.

"Four thousand and one hundred, and the call-out."

"That's..." He laughed. It came out wrong. "That is exactly what I had. That is the number I walked in with on Thursday. That is..."

"That is what it costs," Prudence said. "It is not a coincidence and it is not a cruelty. It is four days of a notary, a filing agent, two searches, and eleven years of knowing which office to file it in. I do not discount. I have been asked."

"By who."

"By everyone." She put the glasses back on. "Two hundred and six," she said. "That is how many I have moved out of inventory. It is written on the wall of my office and I update it myself and I have never once done it for free, and that is precisely why the number is two hundred and six instead of nine." She closed the case. "How many have you done?"

Nobody said anything.

"That is not a cruelty either," Prudence said, more gently. "It is the arithmetic. Everybody in this room wants to be kind. I am the only one here who is organised." She wrote a number on the corner of the sheet and left it face up. "That is my queue reference. The quote is good for thirty days. My condolences on the ice cream."

She went down the ramp without looking at the ramp.

Ozzy sold the lot on the Wednesday and the Thursday.

The nine hundred and forty had been the cheap part. What was left of the four thousand had gone the following Monday into blanks, ink, and two crates of shirt stock, because he had been flush and happy and he had done the thing he always did, which his sister had a spreadsheet about. So there was no float. There was a lot, and the lot was the float.

It took two days because he did it properly, which was the only way he knew how to do it, and because doing it properly meant standing in nine different rooms explaining to nine different people why sealed period Cherrytop with an intact chain was worth more than they were offering, and then taking what they were offering.

He talked one dealer up two hundred. He talked another up sixty. At the fourth stop he heard himself pricing the lot down, out loud, against his own interest, because the man was hesitating and Ozzy could not physically tolerate a stalled negotiation, and Cas, who had come along and had not said one word all morning, put two fingers on the counter next to his hand, and he stopped, and got the number back up.

In the van afterward he sat with the tablet on his knees and did not turn it on.

"Three thousand nine hundred and sixty," Cas said.

"I know."

"You are one hundred and forty short of the instrument and two hundred and ninety short with the call-out."

"I know, Cas."

Three seconds.

"I have four hundred," she said.

He looked at her.

"It is not a loan and I am not discussing it and if you say anything at all I will put it back in the tin." She was looking straight out of the windscreen. "Item one. The cartons were yours and you sold them. Item two, the four hundred is in a tin behind the dead filtration lines and it has been four hundred for two years, because it is for a part, and the part is not coming, and I have known that for a year." Two seconds. "Item three. Drive."

"I can't drive."

"Then say something else."

"...Do you want to hear what I'd have got for carton four."

"No."

"Eleven hundred. Eleven hundred, Cas, for one carton, because carton four had the manager's stock in it, and..."

He stopped.

"What was in carton four," Cas said.

The card was laminated, about the size of a hand, and it had the Cherrytop mark printed on it in the original ink, which had not been the same ink since 2051.

Cas had it under the bench light with a loupe, and Topper was standing on a crate at the end of the bench looking at it the way you look at a photograph of somebody who used to hit you.

"Say the rest of it," Cas said.

"A shop had one," Topper said. "The manager kept it. It was for the floor. If a unit was, mm. If a unit was having a difficulty. You showed the card, and the unit could see the mark, and the mark was..." They stopped, and started again. "The mark is a genuine period item. So the unit does what you would like. It is not magic. It is about four seconds and it feels like being politely interrupted from the inside of your own head."

"Four seconds is enough to walk somebody into a van," Cas said.

"Yes."

"Ozzy prints this mark on shirts."

"Yes," said Topper. "That is different and I am glad about it every day. His do not work." They looked around at Ozzy. "You know that, yes? Your shirts do not work. They are not authenticated. There is nothing in them. They are just... they are just a picture of my face on a shirt for eight credits."

"Yeah," Ozzy said.

"I have seen them at the market. I nearly bought one." Topper's chest moved. "I could not work out whether I was allowed to be offended, so I did not buy one, and then I thought about it for a year."

Ozzy picked up the card.

He had it in his hand for a while. He was aware of everybody being extremely busy in other parts of the garage in the way that five people are busy when they are not busy. Grigor was at the stove with his back turned and had been stirring the same thing for four minutes. Danka was under the hatchback with her legs out and had not made a sound in six. Theo was on the mezzanine with the camera down, lens against their thigh, which was where it had been for eight days.

"Eleven hundred," Ozzy said. "Minimum. That's the real number. That card, with that chain, to the right collector? I could name a price and they'd pay it and then they'd thank me."

"Yes," said Cas.

"Or I burn it, and it's gone, and nobody ever uses it on anybody again."

"That is the sentimental option and it is also the correct one," Cas said, "except that it is not, because there are four more of those cards in this city that I know about and destroying yours does not destroy theirs, and then Topper has nothing and somebody else has a card."

"So what's the third option," Ozzy said.

Cas did not answer. Cas, who had an answer for everything, itemised, in order, with a number attached, put down the loupe and did not answer, and looked at the card, and then very slightly at Topper, and then back at the card.

So Ozzy worked it out himself, which he would be insufferable about for a month.

He turned around and held the card out.

Topper did not take it.

"That is worth eleven hundred credits," Topper said.

"Yeah."

"I do not have that. I do not have any credits. I have a trauma case and one boot that is not mine."

"Not selling it to you," Ozzy said. "Try again."

Topper looked at the card. The garage did the thing it did, fridge and stove and the Ring Road going through the north wall like weather.

"Why," they said.

And Ozzy opened his mouth to say the number, because the number was right there, the number was always right there, nine hundred and forty and eleven hundred and four thousand one hundred and two hundred and six, the whole running total that had been going in the back of his head since Thursday like a till that would not close.

And nothing came out.

He stood there with his mouth open and the card in his hand and absolutely no number in his head, for the first time since he was seven years old, and it was horrible, and he could not have told you why he was smiling.

"Take the card," he said.

Topper took the card.

They held it for a second with both hands, the way they held the trauma case, the way you hold a thing you have decided in advance that nobody is going to take. Then they put it inside the coverall, against the chest, where everybody in that garage kept the one piece of paper that mattered, because the north wall sweated and paper died in the Wash and every single one of them had learned that the same way.

Nobody pointed that out. Five people noticed it and nobody said a word.

"What do I owe you," Topper said.

"Nothing."

"That is not an answer, that is a kindness. I am asking the real question." They looked up. "I was in a lot with eleven boxes and I know what the boxes went for, because your friend read the number out in the kitchen and I was in the room. So I would like to know the rest of it. What did I cost?"

And that was the one.

Ozzy had priced a live grenade. He had priced his own shoes out loud at his mother's table, twice, on purpose the second time. He had, at nine years old, priced a dog.

"I don't know," he said.

"You know every number."

"I know. I know I do." He rubbed his face. "I've got nothing. There's nothing there. I've been standing here about a minute and a half and there is nothing there, and I'm going to be honest with you, I'm finding it a bit..."

He made a gesture. It did not mean anything.

Behind them, at the stove, Grigor put the lid on the pot.

"Set another place," he said.

The instrument was filed on the fourteenth. It seasons in two years. Prudence sent the queue reference by hand, on paper, with a stamp, and did not discount the call-out.

Theo never posted any of it. There are eight days of footage from the mezzanine, and a card that was hand-lettered on the Thursday night and never used, and both of them are on the drive on the shelf, and the card says:

eleven boxes and

The lowest water of the month came at 0412 and held seventy-one minutes, and the harbor authority counts us in the same seventy-one minutes. Nobody planned that. The tide pulls back off the platform legs and exposes what the Shelf is standing on, so of course that is when the census skiffs come out with their lamps. It is also the only window when the lower ladders are anything but a drowning. The one hour a month you can get into the Old City under the market is the one hour a month a man in a boat is looking at the market with a light.

You learn that your first week on the Shelf. Then you spend years learning there is nothing to do about it.

I went down head first, which is not bravado. It is the build. Clouded leopard, Corsair infiltration line, and what they bought when they bought that template was the ankles. Mine rotate almost all the way around, so I come down a vertical face nose-first like water finding a drain, on wet steel, one hand on the rail. Baselines go down a ladder with their back to the drop. I go down looking at where I am going. It is the most useful thing about me and it has been failing for eleven months.

That is the other half of the build. The joint that gives you the descent is held together by tendon the design ran a little thin, and after enough years it catches. Mine catch now. Left one first, a small hard click at about a hundred degrees of rotation, and the ankle stops taking weight for a quarter second while it decides. A quarter second is nothing. A quarter second nine meters up a bad ladder over a flooded shaft is an entire biography.

I clicked twice on the way down that morning. Both times I got the hand on the rail. I want that on the record because of what happens later.

The job came off Hendra's folding table, which is where most of my jobs come from.

Hendra is not a fixer. He would be insulted by the word. He is a licensing agent with a card that says so, and he sets up a folding table at the harbor end of the market and moves paperwork for people who cannot move their own. Transit registrations. Elevation permits. Vendor documentation for Shelf people who occasionally have to pretend they exist above two hundred credits. He does not lie to you, which in the Scatter passes for a moral philosophy.

"There's a box under Platform Central," he said, not looking up from a stamp. "Grey, about so, cabled into the anchor bolts. Client wants it intact and above water inside the month."

"Under Platform Central is a building."

"Under Platform Central is a roof, and under the roof is a building, and in the building is a sealed level that has been dry for twenty-two years." He stamped again. "Six thousand, on delivery."

Six thousand is a year at the clinic. Not the licensed one, which I cannot use, and I will get to why. Six thousand is a year of a woman in the outer district with a good centrifuge who can keep a Corsair-line body from coming apart on schedule. Eleven months of clicking ankles will make you sit in a market chair and say yes to a sentence with the word sealed in it.

"Who's the client?"

"You know I don't know."

"You always know."

"I always know who handed me the paper." He set the stamp down. "This came in on a requisition. There's a difference and you are going to hate it, so let's do it after you get paid."

Here is the Shelf, so the rest lands.

Old Jakarta is eight meters down. The water did not scour the city, it closed over it, and on a clear morning at low water you can lean off a walkway and read street signs. The market is built on the rooftops. Not near them, on them: platforms bolted to the roof slabs of buildings still standing exactly where they were built, with ladders going down through the old stairwell shafts into rooms people used to work in. Four hundred vendors, maybe nine hundred souls living up there full time, and an economy the Maritime Council has decided not to see because seeing it would mean funding it.

And this is the part that matters. The Shelf has power and it has water.

Not a lot. Enough. In a city where four thousand people in the outer districts have been asking for stable water for eight months through every channel that exists, the market over the drowned grid has taps that run. Everybody up there has a story about why. The one I liked was that a Council member's mother sold fish off Platform Central in 2049 and left standing instructions. The Scatter loves that kind of story. It lets you believe a person did it.

The truth is the anchor bolts, and the anchor bolts is what I went down to steal.

Pak Yusuf let me down. He is the gatekeeper on Central, which means he owns a ladder and therefore owns a portion of the world. He is eighty, he sits in the same chair, and he has never once been rude to me. I owed him a favor from four years back, undefined, and he cashed it that morning by not cashing it.

"You'll bring it back up," he said. Not a question, and not quite a demand.

"I'll bring it up."

"That is not what I said." He looked at the rail where the bolts come through the deck, four of them, thicker than my arm, gone green at the collars. "Those have been warm my whole time here. Warm in December. You know what is under a bolt that is warm."

"Something running."

"Something running," he agreed, and moved his chair a hand's width so I could open the hatch.

The shaft goes down through the roof slab and then it is old building. Landings, doorframes, a handrail somebody painted yellow in about 2038. At the lowest water of the month it drains to the fourth level down, and there is a corridor there that runs level for forty meters with a meter and a half of air under the ceiling. That is what I had. Forty meters of chest-deep black water and a ceiling I could reach.

You read a dead building off its surfaces. Rust tells you where the wet gets in. Wear tells you where people walked. This corridor had a maintenance rail bolted along the ceiling with cable trays hanging off it, and every tray was dry on top and running warm.

Warm. Eight meters under a harbor, twenty-two years dead, and the cable trays were warm to the back of my hand.

Ardi hit me at the twenty-meter mark.

He came up out of the water without a sound, which is the whole point of him, and he had my collar and half my weight off the floor before I understood what part of the dark had moved. Saltwater croc. Boarding stock. Two meters of him, a chest built to hold a hull line in a swell, membranes over the eyes so the silt does not matter. We served together six years. He went through the water and I went over the outside, and then the Corsairs discharged me and kept him.

"Ratri," he said. He sounded genuinely sorry.

Then he put me under.

Here is the thing about a fight in a meter and a half of water in a corridor with no light. He owned the floor and he owned the water. What he could not own was the ceiling, because a body built to hold a boarding line to a hull cannot hang off a rail with its feet turned around backwards. Mine can. I let him drive me down, went with it, got a hand on the tray bracket over his shoulder and took myself up out of his grip in one pull, and then I was above him with both ankles hooked over the maintenance rail and my whole weight free to do one thing.

I did that one thing with an elbow, twice, on the hinge of his jaw, from above, with the rail taking the load. He went down into the water on the second one and came up on his knees with his hands open.

We breathed at each other in the dark for a while.

"Six thousand," I said.

"Six thousand," he said. His mouth was not working right. "Hendra."

I got my contract chit out and held it in front of his face, and after a moment he got his out, and we sat in a drowned corridor comparing two pieces of plastic like a pair of clerks.

Same job. Same box. Same fee. The reference sequences ran nine digits and matched to the last one, and the last one was a four on his and a five on mine.

He looked at it a long time. Ardi was Corsair for eleven years, and Corsairs are taught to look at a sequence and ask who generated it.

"Nobody chose," he said.

"No."

"It just asked for two."

"It just asked for two."

He sat back against the wall with the water at his chest. "Go on, then," he said. "I can't climb."

The sealed level was behind a door closed since before the sea came, and it was dry, and it had the smell dry pre-Upheaval rooms have, which is nothing at all. Twenty-two years of nothing. Racks on three walls, most of them empty. On the fourth wall, the box.

Grey, half a meter, stencilled FACILITIES BUS 4. Cabled out through the wall into the bolt shafts, four heavy runs going up into the roof slab and from there into every improvised tap and pump on the market above. Warm. Under a service panel sat a core the size of my fist with the tired grey-gold cast Lumicite gets when it has been giving for a very long time.

And on a shelf beside it, a slate, still on, still reporting.

I want to be careful here, because when I tell it in a market I let people think I understood it all at once. I did not. I stood in that room for four minutes of a seventy-one minute window reading a maintenance log with a dead man's face.

The building had a facilities system. Every building that size had one. It watched its own load and filed status to the district infrastructure authority, and when that authority drowned the filings did not stop, because the box did not know the district had drowned. It knew its bus. It knew its load. So for twenty-two years, four times an hour, a building at the bottom of the harbor has reported that it is present, occupied, drawing within tolerance, and in good standing.

New Batavia's infrastructure management system did not build that record. It inherited it. When the PFZ stood up the city on the highlands they ingested every legacy node in the catchment, because that is what you do, and nobody has ever audited a node that has never once thrown a fault.

So the Shelf gets water. The reason is not a Council member's mother. An algorithm in an office up on the highlands has been allocating clean water to a compliant building it has never visited, and the building has been passing it up the bolts, and every twenty-eight days the census skiff writes down that Platform Central is accounted for because the system it checks against says the address is live.

The Shelf is not outside the system. The Shelf is a room in a building that died and never stopped paying rent.

Out in the outer districts they ration by permit priority. Up on the market the taps run. Nobody up there is stealing anything, and nobody down here ever decided any of it.

I cut the box out anyway.

Four bolts, two cable runs, a cutter. While I worked I kept waiting for the other thing, the famous thing, the light on the drowned grid three hundred meters east that has cycled green to amber to red every forty-seven seconds for twenty-two years and that nobody has explained. I thought I was about to explain it. I had the speech ready for Yusuf.

I pulled the last run and put my hand on the wall and felt the bus go quiet, and out east through eight meters of water the light changed on schedule, and changed again, and changed again.

Not mine. Never was. Whatever runs that is something else, and it does not care about me, and I have thought about that more than I have thought about the money.

The surge came early. It does that in August. I went up the shaft with the box on my back and the water taking the fourth landing while I was still on it, and at the second landing the left ankle clicked and did not come back for a full second, and I hung off one hand and one hip with a Lumicite core banging my spine.

I got to the hatch with nine minutes left in the window. Pak Yusuf was standing at the rail with his lamp off, watching a census skiff work down the platform line four stalls away.

That was the part I had not solved. The moment the bus went quiet, Platform Central stopped filing. At the next census the skiff writes down a platform its system says is not there, and that is a flag, and two flags is a boarding inspection, and a boarding inspection of the Shelf is nine hundred people explaining what they live on.

I had eight minutes.

I want to tell you I agonized. I did not. I had known since the fourth minute in that room, and I had spent the whole climb pretending I had not.

My lineage tag is a ceramic chit the size of a thumbnail, and it says I am Corsair infiltration stock, template on file, Drift assessment current, residency in good standing. Every word of that is a lie except the first two. I have not been assessed in three years and I will not be, because a licensed clinic that scans me writes down a Stage that ends my permit, and the Council does not want it written down either. A veteran's Stage in a file is a question somebody has to answer. So the tag says good standing, and it will keep saying it, because the one thing the system never does is look at a record that has never thrown a fault.

I went back down four rungs to the junction box at the bolt collar. I stripped the two signal runs. I wired my tag into the bus.

It took ninety seconds and my hands were not good and the lamp came along the rail above me twice while I worked. When I came up the last rungs the census man was two stalls off and his light went over the deck and over the hatch and over Yusuf's chair, and he wrote something on his slate, and he moved on.

Platform Central is present, occupied, drawing within tolerance, and in good standing. It will keep saying so. It has my name on it now.

Hendra paid me at his folding table at 0740 with the market coming up around us, coconut water and hot oil and a woman two stalls down shouting about the price of ice. Six thousand. He counted it twice because he counts everything twice.

"Now tell me about the requisition," I said.

He turned the slate around.

It was a form. Line item, one legacy facilities controller, recovery and delivery, valuation ceiling, reference sequences ending in a four and a five. Requesting authority was not a person. It was a designation, six characters, the asset reassessment function inside the infrastructure management system, which had flagged Platform Central as an under-reporting legacy node and raised an automatic notice to recover and evaluate the hardware.

Approval field was blank. Under the threshold, nothing needs approving.

"There's no one at the end of it," I said.

"There's a queue," Hendra said. "The queue has a window. Somebody in an office will open the box in a year and write a note nobody reads." He took the slate back. "I told you that you'd hate it."

I did not hate it. It would be so much better if a man had wanted the Shelf gone. You can find a man. You can go to his office and put your hand on his desk. I went eight meters down into a drowned building and fought a friend in the dark and cut the heart out of a market and sold it, and the buyer was a field on a form, and none of it was aimed at anybody.

Ardi came out of the water an hour later at the north ladder with his jaw wrong and no box, and took the loss like a professional. He is registered. He is current. He has a clinic and a Stage on file and eleven good years left. I told him where the fee went and he laughed at me, which I earned.

I went to the outer district on Tuesday with six thousand credits and sat down in front of the woman with the good centrifuge. She put the reader on my wrist and it came up empty. The tag is in a junction box at the bottom of a shaft under Platform Central, keeping nine hundred people accounted for, four times an hour, forever.

She looked at the reader, then at me, and did not say anything unkind. She has been doing this a long time.

"I can work off a name," she said.

"I don't have one of those either. Not one that will scan."

"Then we'll do it off the body," she said, and got the chair ready.

She can do that for a while. Not forever. There is a point where you need a licensed door, and a licensed door needs a record. I traded mine. I knew what I was trading when I stripped the runs.

I sit on Central most mornings now with Yusuf, in the second chair, which he moved over without being asked. Low water comes around and the platform legs come out of the harbor black and green, and the skiff comes down the line with its lamp, and it passes us, and it does not stop. Eight meters down the street signs are readable. Somebody's shop. Somebody's corner.

Three hundred meters east, in water clear enough to drink with your eyes, a light that belongs to nothing I understand goes green, and amber, and red, and green.

The air at the bottom of the crawl was down around six percent oxygen and thick with old concrete gas, and I want you to understand that I noticed this the way you notice a room is beige. A baseline in that basement would have had about ninety seconds of very bad decisions in them before they lay down and stopped arguing. I lay on my belly in it with my cheek in the dust and waited for my hands to warm up, and thought about how much I hate a building that has already decided how it's going to fall.

That's the build. Tunnel recovery stock, mole rat line, made by a program that wanted a body it could send into a hole that no longer had a floor plan. Blood that carries in air that isn't worth carrying. Lungs that treat dead air as air. Skin loose enough that I can turn around in a space narrower than my shoulders, and a pain response somebody edited with a very light pen, so the acid burn that makes a person's eyes stream and their throat close is, for me, a flavor. They also gave me collagen that tumors have a hard time growing through, which is the line on the spec sheet that decides my whole career, because it means the going rate for putting me in hot ground is lower than the rate for a shielded drone that would quit in the same room. And the trade, the part nobody puts in the sales copy, is that I cannot hold heat. Two hours on cold rubble and my core slides and my fingers go to wood, and my eyes were never much, small and weak and built for a world lit by other people's lamps. I am thirty-four. I have a lump under my jaw the size of a date that I have not had anyone look at, because the tumor resistance is a resistance and not a wall, and because the only clinic in walking distance trades in HYDRA-CLEAN and antibiotic guesses. So the same paragraph that makes me employable is the paragraph that will file the cause of death. You get used to reading yourself as an inventory item. Some days it's restful.

Where I work, there is nowhere else to work.

Twenty-four years ago fourteen warheads came down across this ground and the governments that owned it stopped existing inside a week. What's left is not a city and not a country. It is a topography. The radiation never spread evenly, so the Zone is a lace of lethal pockets sitting up against ground you can walk on all day, and the difference between the two is not marked, and no satellite reads it, and no bloc has a current map. The Heralds of the Storm have the map. They have it in their feet. Their people walked the safe ground so many thousand times that the safe ground is worn smooth, and that is the whole navigational system of the Forbidden Zone: look for the path that generations of water runners have polished into the dirt, and stay on it, because the hot pocket starts four meters to your left and it does not put up a sign. There are no drones over the Zone. Electronics rot here. There is no traffic and no grid hum, so the sound of the place is wind coming across rubble and the occasional structural sigh of a building finishing an argument it started in 2042.

And there are the fish. But I'll get to the fish.

The job came to me the way everything comes to me, through Daniyal at the Warrens hire point, sitting behind his stacked corridor maps like a man selling weather. Daniyal deals paper that is honest about being outdated, which in this economy makes him a saint. He had a client he would not name, and the client had a target he described in one sentence: the sealed room in the basement of the old university library, out in the Archive Ruins, and everything in it.

"There's no basement in that building," I said.

"There is now. A floor section dropped last winter." He didn't look up. "It's not on the Herald maps either. That is the interesting part of the sentence, if you want me to be honest with you, and I would rather be honest early than late."

"Fee."

"Four drums of purification chemical, delivered to Grid 7-North against your name, plus a fine-gradient dosimeter you keep after."

I want you to appreciate that offer, because it tells you everything about what kind of money moves in this place. There is currency in the Zone but nobody with sense takes it. What you take is the stuff that decides whether twelve thousand people drink next season. Grid 7-North is a pre-war purification station that has been kept alive on hand tools and stubbornness for twenty-four years, and its chemical stock has been sliding for a while now, and the Heralds who run the technical side of the plant have not told the survivor communities the number. I knew the number, roughly, the way anyone in the Warrens knows it, which is to say from a maintenance crewman who told his partner. Four drums against my name meant my name would be on a wall in the distribution office for a season, and people would know it, and a body like mine that has no faction, no medical, no extraction and no ticket has to build its future out of exactly that kind of debt. I am dry. I have always been dry. The only bank a dry operator has is the number of people who remember she showed up.

I said yes at the price of the drums. I want that on the record, since the whole thing turns on it.

Priya guided me in. She is a Herald and she works the hire point independently, and she screens her clients now, ever since she took a faction team out to the Archive Ruins and only two of them came back and she started doing arithmetic she can't put down. She walked me east in the dark with no light at all, at the pace of a woman going to a job she has done ten thousand times, and twice she put out a hand and moved me twenty centimeters to the right for reasons she did not explain.

We passed a Herald sitting cross-legged in the middle of the path, facing us, not blocking, dew already settled on her shoulders. She had been there long enough to be furniture. Priya greeted her by name. The woman looked at me for a while and then went back to looking at nothing, and Priya said nothing about it for four hundred meters, and then said, "She was deciding whether you smell like a person."

That is a real problem for everyone but me. The Heralds can smell an outsider at conversational distance. Three days of chain-fed rations, synthetic kit and faction soap make a signature they read like a name tag, and their night patrols do not challenge, they simply follow you until they have decided. What I smell like is a body that has been metabolizing in the same isotope profile they have, out of the same water, wearing salvage, for six years. My build is close enough to theirs on that one narrow axis that I read as local. It is the single most valuable thing about me in this territory and it is not a skill, it is an accident of who they built me from, and I have never once been able to charge for it directly.

Now the fish.

Everywhere in the Zone that water collects, there are filter-fish, small and pale and unimpressive, and they are the only instrument anybody actually trusts. A dosimeter tells you about right now. The fish tell you about the last two years. Where they're thick, the pool has been survivable long enough for something to establish, breed, and go on with the family business. Where they're gone, and they were there last month, something has moved, and you do not drink, and you do not wash, and you get off that route. Twelve thousand people organize their water runs around the presence of a fish nobody would look at twice, and the Heralds who could give the survivor communities the corridor updates in one afternoon instead let them keep reading the fish, because a population that reads fish is a population that asks its questions of the water and not of the council. That is the Zone's whole government in one image. Nobody lies to anybody. Nobody tells them anything either. You are simply left with a pool and an animal and the freedom to interpret.

The library is still standing because the blast that flattened its twin next door came in at an angle this one deflected. The bottom two floors are intact. The stacks have been through by Heralds who took what mattered to them and left the shape of their own interest behind, and eleven external teams have been through since, each of them helpfully telling the patrols what the blocs currently believe by which shelf they crowd around.

I found the dropped floor section at the north end, went down it on rope, and got into the crawl.

Nine meters of it, hands and hips, ceiling coming down to about the depth of a body. This is the part of the job I am for. A baseline with a shielded suit is too thick to get through and too loud, and anything on wheels is a joke, and the dead air in a sealed basement pocket is a wall to everybody but me. I could taste the CO2 like a coin in my mouth. The metallic quality further along was not the CO2. My borrowed dosimeter, the fine-gradient one Daniyal fronted me, showed me the number I had already decided to live with, and gave me ninety minutes at that number before it stopped being a number I had decided anything about. The margin has drifted here. Everyone knows the margins drift and nobody's map says where.

The door at the end had a bar and a padlock on it, and the bar and the padlock were post-war, and I sat in the dark with them in my hands for longer than the clock could really afford. Herald steel. Hand forged, the way they do it, the ugly good welds.

Nobody missed this room. Somebody locked it.

I cut the bar with a hydraulic spreader and got the door back and put my light in, and inside was a pre-war cold-line cabinet, dead as furniture for twenty-four years, and in the cabinet was a steel sample case the size of a shoebox. Twenty-two glass ampoules in foam. A paper inventory card in a sleeve on the lid, typed, with a program header and a line of designation codes. Physical documents survive here where electronic storage doesn't, so paper is the whole trade in the Archive Ruins, and I could not read the card, because the languages I have are the ones you pick up in a warren.

My hands had gone. That was the moment the build sent its invoice. Two hours on cold concrete and my core was down and my fingers were doing a passable imitation of somebody else's fingers, and I got the case out of the cabinet and dropped it, and it went down on the corner and I heard glass move inside and I lay on the floor with my face on the case and put my hands inside my shirt against my ribs and counted to two hundred while my ninety minutes ran, and thought about the woman in the Warrens who keeps telling me to take a warm body's job somewhere with a roof.

Then there was a light behind me in the crawl.

She came through the last three meters on her elbows and lay there breathing wrong, and she had a pistol out and her own dosimeter chirping at her the way consumer grade does, in a panic, with no gradient in it, just a threshold and an opinion. Sergeant Nadia Brecht, EO field intelligence, unacknowledged, eleven weeks in a place calibrated for other people's bodies. Her resupply contact stopped answering at week eight. She had been buying corridor access off Daniyal like everybody else, which is how she knew where I was going, and her face in the light off the wall was the color of a filing cabinet.

"Put it down," she said.

"You can't carry it out of here," I said. "You can't get back up that rope. Look at your hands."

She looked at her hands. That was the whole negotiation, right there. She was a professional and she had eleven weeks of numbers in her personal log that she had not reported, and her body had been quietly reading them out to her the entire time, and she had reached the part of the arithmetic where she needed something to be worth it.

"Read the card," I said.

She read the card. She had the languages. She got about six lines in and stopped, and then went back to the top and read it again, and she made a sound I have thought about most nights since.

The Heralds did not build the Gift from nothing. They found it here, in this district, in a pre-war program that had gotten genome-level radiation adaptation to work and then had not fielded it, because the people who ran that program had a rule: no irreversible modification goes into a population. So they built the second half first. The card was the inventory for the second half. Twenty-two ampoules of the antagonist compound, the shut-off, the thing that takes the adaptation back out of a body that did not ask for it. Not a bioweapon. Not a cure for a bioweapon. The off switch for a gift.

And the Heralds knew where it was, because they knew where everything in this district is, and they had put a hand-forged bar and a hand-forged lock on it and left it in the ground for twenty-four years.

Brecht said, "Their council is split."

"Their council is split," I agreed, and then I understood who my client was, and my hands went colder than the concrete had managed.

There was a fifteen minute stretch after that where the ceiling gave up about a meter of itself onto her legs and I got it off her one piece at a time, in the dark, in six percent air, with a woman shouting at me in three languages about her own dosimeter. My build was the reason both of us came up that rope. There is no version of the story where I feel good about that being true.

Upstairs in the stacks, on the way out, somebody had been working while we were down there. A section of the pre-war program's paper had been lifted, neatly, with the surrounding material left exactly as it sat. Null Collective works like that. They took the protocol pages, the science, the how, and they had not gone down the hole for the glass at all, because the Collective has never once in its existence wanted a cure. They wanted the method. Whoever 7-Green is, they were already a kilometer down a corridor by then, carrying the recipe for both halves out of the Zone in a satchel.

We came out through Section 9 at first light with the case in my pack and Brecht on my shoulder, and the pools along that stretch were empty of fish. Not thinned. Empty. Two weeks ago they were thick and now the water sat there clean and dead and lovely, and the Heralds had rerouted their runs and mentioned it to nobody, and Priya, waiting at the junction exactly as long as she said she would and not one minute more, looked at the pools and then at my pack and did not ask me a single question, which was its own kind of answer.

The handoff was at the Grid 7-North outer perimeter at 0620, with the distribution queue already three hundred people long behind us in the half dark, everyone carrying more containers than they could comfortably manage. The receiver was a Herald. Unmarked transport, three personnel, four drums coming off the tailgate with the seals still bright, and he took my case and signed nothing, because the deliveries at that gate have never once appeared in the facility manifest.

Nobody said the Elder's name. Nobody had to. The Heralds' council has been arguing for three years about administering their Gift to the whole planet, and one wing of it will not vote yes while the reversal sits in a hole in the Archive Ruins where any bloc with a shovel and a bad idea might dig it up and use it as leverage over a transformed species. Get the shut-off out of the Zone and into a friendly hand, and the last objection in the room stops being an objection. Then you vote. The dispersal is water-soluble. It always was. It goes into an input channel, and the plant pushes it downstream to twelve thousand people, and the couriers who carry it out of the Zone in their blood have their whole lives to carry it further.

So my fee was four drums of purification chemical, and the plant needed those drums to keep running long enough to push the thing through the pipe, and the chemicals were coming to that gate whether I dug or not. I was not paid for the job. I was the receipt. Twenty-two ampoules for a season of clean water, and both halves of the trade were the same water.

I gave Brecht the protocol pages I had lifted off the floor of the stacks while the Collective's dust was still settling. Her ticket home, if she has one. She went east along a corridor that reads marginal on every map Daniyal sells, in the wrong hour, at a pace that told me she had already read her own log and priced herself accordingly. I do not know if she made the staging point.

Two ampoules are in my boot. That is what a dry operator does with a score she does not understand. You keep back the part of it that somebody will eventually have to come to you for, and you get very good at being alive and findable.

I stopped at the Section 9 pool on the walk back, because I had been in dead air for four hours and my mouth tasted of coin. The fish were back. Overnight, thick as I have ever seen them in that pool, nosing at the shallow edge in a mass, fat and pale and absolutely certain that whatever came through here two weeks ago has passed and the water is good again.

I knelt down and put my hands in and drank.