Old Harbor is what Meridian was built to replace and couldn't quite bury. When the sea wall failed in Year 8 — a catastrophic breach that Axiom's own engineering reports had predicted and Axiom's own budget committee had declined to prevent — the lowest sections of the original city flooded permanently. The water came in and never left. What remains is a partially submerged urban landscape: buildings standing in two meters of water, their ground floors drowned and their upper stories colonized by the people nobody else would take. Streets have become canals. Rooftops have become docks. The city gave up on Old Harbor twenty years ago, and Old Harbor returned the favor.

It's beautiful, in the way ruins are always beautiful when nature starts winning. Bioluminescent algae — an engineered strain that escaped from a corporate lab years ago — coats the waterline, turning the flooded streets into rivers of soft blue-green light after dark. Flooded temples and churches rise from the water like stone ghosts, their interiors visible through broken windows, pews floating in lazy circles. Makeshift bridges connect the upper stories of buildings, creating an elevated network of walkways that constitutes Old Harbor's actual street grid. Below, in the water, there are things — salvage, secrets, and according to some residents, the preserved remains of the original city's data infrastructure, still humming away on waterproofed servers nobody has found yet.

Kael grew up here. He arrived as a refugee child in one of the waves of climate displaced people who washed up in Meridian with nothing and were pointed downward. Old Harbor taught him two things: how to survive when no one is coming to help you, and that beauty doesn't require permission. He left when he was old enough to climb to the Shelf, but Old Harbor is still in him — in the way he moves through water, in his comfort with darkness, in his refusal to trust any structure that someone with money built.