With stalker crimes on the rise in Tokyo, the Meiji Jingu Gaien police department decides to form an all-female “Sex Crime Investigation Unit”. As the first order of business a member of the theft division (Sayaka Yoshino) is paired with a member of the community safety division (Saki Akai). With no experience in brutal crimes, the pair is obviously unprepared for what they’re going to face, so two more experienced detectives (Chiharu Konno and Hiroko Sato) are soon dispatched to join the them. However, it’s already clear to the public and media that this unit is just a gimmick to improve the station’s public image.

Meanwhile, within the Meiji Jingu Gaien jurisdiction a rape-murder has occured in which the victim’s corpse was stuffed into a refrigerator. A manhunt is immediately initiated, but predictably the newly-formed “Sex Crime Investigation Unit” is not counted on to help. As more murders occur at the hands of a demented stalker, the female unit takes it upon themselves to get involved in the investigation amidst sexism, corruption, and betrayal within their own department. Unfortunately, out on their own without any backing the four women are at the mercy of the killer, and it’s up to top investigator Detective Ito (Hitoshi Ozawa) to hunt him down before it’s too late.