Mizuki's husband (Yusuke) drowned at sea three years ago. When he suddenly comes back home, she is not that surprised. Instead, Mizuki is wondering what took him so long. She agrees to let Yusuke take her on a journey.
As sadomasochistic yakuza enforcer Kakihara searches for his missing boss he comes across Ichi, a repressed and psychotic killer who may be able to inflict levels of pain that Kakihara has only dreamed of.
The humanity is suffering from murders all over the globe, called "Mincemeat murders". High school student, Izumi Shinichi has a parasite living off him, having replaced his right hand, and he might be the discoverer of truth.