The fourth installment in the Bosozoku film series starring Koichi Iwaki.

A famous businessman's links with organized crime are looked into by the Zero Division of the Tokyo Police, with the investigation being headed by a highly trained, extremely violent and very beautiful female officer. When not having shoot-outs with the crime syndicate thugs trying to kill her, she spends most of her time in her apartment, wearing lingerie and taking showers. A sub-plot involves the businessman's S&M-obsessed daughter.

Tarao’s services are called upon to solve the mysterious death of bride-to-be, Mariko, who was found dead with an eerie mask of a devil.