When a number of suicide victims slash themselves in their sleep, detective Keiko Kirishima is called to investigate.

After his girlfriend commits suicide, a man becomes embroiled in gang warfare attempting to obtain a gun in hopes to kill himself.

A businessman, Tsuda, runs into a childhood friend, Kojima, on the subway. Kojima is working as a semiprofessional boxer. Tsuda soon begins to suspect that Kojima might be having an…