After an explosion unleashes the contents of a military bio-weapons plant, the unsuspecting populace is transformed into a roaming army of flesh-eating zombies. Trapped in the quarantine zone, Jim finds himself cut off, confused and fighting for his own survival. Contacted by a small band of others unaffected by the toxins, Jim sets out to reach their besieged warehouse. Becoming the group's de-facto leader, he struggles to keep order as they hunker down, fortify their stronghold and arm themselves against the attacking mutants. Fragmentary radio reports from outside hint at a last-ditch government rescue plan. But can the survivors hold out until help arrives or will they succumb to the living hell of an undead apocalypse?