After 31 years at-large, detectives in Wichita, Kansas hone in on the serial killer known as BTK.

Akira (Hayato Ichihara) admires Genyo Kamiura, the most powerful yakuza. Genyo Kamiura has been targeted numerous times, but he has never been killed. He is called the invincible person. Because of Genyo Kamiura, Akira enters the world of the yakuza. His yakuza colleagues treat him like an idiot, and Akira can’t even get tattoos because of his sensitive skin. An assassin is sent to take out Genyo Kamiura. The killers know that Genyo Kamiura is a vampire. Thus begins the apocalypse.

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.