It has been nearly two decades since the Event turned Earth into a nuclear wasteland. Survivors from the fallout find themselves inside the ravaged territory of Zone 404, isolated land surrounded by lethal radiation. The 404 is home to cannibalistic mutants, scarce resources, and the majority of the living population have banded into four different factions. These factions have been fighting over land, supplies, and bad blood for eighteen years to no conclusion. One of the few to remain neutral in all of the bloodshed is Leena Spero, a scavenger and a loner. Always following her instincts to trust no one and flee at the first sign of trouble, Leena is sucked further and further into the Faction Wars, finding that she, too, has to eventually pick a side.