Akira Takashiro is an ordinary high schooler in Tachikawa, Tokyo, wrapped up in basketball, his rival Eiji and his feelings for Miku at another school, until a massive earthquake levels the city around him. Pulling himself out of the rubble of his school, he finds a heap of corpses and a monstrous creature feeding on them. As more of the things surface from the broken ground across Japan, Akira has to survive a collapsing world overrun by predators that exist to wipe out humanity.