District of Flooded London.
Tower Quarter. The Fortress. The tidal energy converter is here, damaged in the engagement of 2062 and running at partial output; below sixty percent the Slab goes dark. The garrison holds it for the Resistance. Beneath the Tower, the pre-Upheaval archive, with an environmental section sealed three months ago under an Infrastructure Assessment Quarantine. The archive designation is confirmed. The reason for it is not. One document in that archive would take the converter to full output. Three factions know this.
District 4, the Fortress. Battle site of 2062. The tidal energy converter sits here, damaged and half-running, and everyone wants it. The Tower Quarter garrison holds it for the Resistance under Commander Voss, and the pre-Upheaval archive beneath the Tower holds the one document that would take the converter to full output.