In the aftermath of a massive earthquake, a Japanese elementary school is transported into a hostile world where the students and teachers are besieged by terrifying creatures and beset by madness.

Kazuo Umezz's horror classic continues as the stranded students face an internal power coup, a wasteland monster with a voracious appetite and a plague. As tensions mount and treachery abounds both inside and out of the school walls, the kids must face a harsh truth. They may need to venture out into the bleak world beyond the weakening safety of the school walls in order to survive.