Fuller Park was the least populated community area in Chicago, a small South Side pocket bisected by the Dan Ryan Expressway, which cut through it like a blade through already-thin fabric. It was a neighborhood defined by what had been taken from it — residents, investment, attention, hope. When the corporate sovereignty treaties redrew GLMZ's map, Fuller Park was not annexed. It was not developed. It was not even officially abandoned. It was simply not included. The Burnline exists in the gap between corporate jurisdictions, a district that belongs to no one because no one wanted it.

The Dan Ryan's footprint was converted into a Ferrogate Transit maglev corridor in the 2040s, its massive concrete infrastructure repurposed as the support structure for an elevated transit line connecting the South Side to the Core. The construction process incinerated what remained of Fuller Park's built environment on either side of the corridor — demolition, clearing, scorch-and-build. When the maglev was complete, the cleared land on either side was designated as a transit buffer zone. No construction permitted. No habitation authorized. The Burnline gets its name from this process: the neighborhood was burned to make room for a transit system that does not stop here.

But people live in the Burnline. They always have. The buffer zone's prohibition on construction is enforced by Ferrogate Transit's security drones, which patrol the corridor and destroy unauthorized structures. The residents have adapted. They build nothing permanent. Shelters are assembled from materials that can be disassembled in the time it takes a drone to complete its patrol circuit — approximately seven minutes. Entire camps appear and vanish on this rhythm, a community that exists in the gaps between surveillance sweeps, constructing and deconstructing its own neighborhood multiple times per day. It is exhausting. It is also a form of engineering that no corporate architect could replicate.

The Burnline's population is the most vulnerable in GLMZ — untier-ed individuals, the displaced, the excluded, people for whom even the Gray Zone's minimal protections are unavailable. There is no economy here in any formal sense. There is sharing. There is mutual aid. There is the particular solidarity of people who have nothing left to lose and therefore nothing left to protect except each other. The maglev passes overhead every four minutes, carrying Tier 3 passengers between the South Side and the Core. They do not look down. The Burnline is invisible from above, which is exactly how its residents survive.