Based on the comic by Tsuchida Seiki, inspired by the artist's own life experience, this film portrays the loss and regeneration of the life of four men.

A countryside in 1988. Shun is crazy about fooling around with his best friends. Facing up with their family environment or bullying in school, they struggle against the problems in their adolescents.

Sawada's childhood was shaped by his mother's abuse. Mentally wounded, he suffered from violent bullying attacks from his classmates as a teenager. But surprisingly he gets help from Kikuchi, who is the same age and who grew up with his brutal father and has learned to compensate for his hatred with outbursts of violence. They instinctively feel drawn to each other, but instead of finding a way out together, they remain driven from their traumatic childhood. During a visit to Sawada's mother's apartment, a catastrophe breaks out and a desperate escape begins.

Six complete strangers with widely varying personalities are involuntarily placed in an endless maze of interlocking cube-shaped rooms containing deadly traps.