In a future where a meteor crashes onto Earth, a highly virulent organism, known as M34, is released. The virus infects humans, turning them into vicious monsters and wiping out most of the population. In response, government agencies are established to combat the outbreak. One such agency, NOA, equips its soldiers with nanomachines that enable them to transform and battle the infected. However, the virus mutates, growing too powerful for NOA to contain. The fate of the world then falls to a 16‑year‑old girl who possesses the power to defeat the virus.