The story starts with a serial killer, whose victims are lone women and acts are perpetrated in Mizuno Maki's neighborhood (it is suggested that Motoki is this serial killer). Motoki is a police officer with 2 faces: he has an obsession for housewife Maki and is very gentle with her, and on the other side he rapes & tortures one of her friend, Kanda Uno. His ultimate goal seems to make Maki fall in love with him: so he uses her friend Uno to affect her relationship with her husband & he gradually introduces himself into her life. Another person is also obsessed with Maki (she is a sort of public personality as she runs a cooking club with other housewives and appears in magazines), harassing her all the time on the phone, spying on her, etc...: this person is close to her as he knows things from her past (her son drowned in an accident). Motoki also had an ordeal in his past: his mother was killed in a fire, by her lover.

Sunao Sato, who runs the studio following the wishes of her parents, who was a master of social dance, was spending days with her sister Hazuki and her partner Ryosuke. One day, Keiji, whose partner was refused in Hazuki, attacks her, and Ryosuke, who happens to pass by accident, saves Hazuki ...