Hajime Kai

A wealthy real estate investor is forced to watch the rape of his girlfriend and then is sent a film showing the fact. He hires a hitman, Sho, and shows him the film, so that the detective can get rid of the criminals. But the boss of the criminal band is Ko, Sho's archnemesis, who raped and murdered his girlfriend.

While an obscene audio tape is played, a young woman has sex. She becomes obsessed with the recording and can only achieve orgasm if she is listening to it. Complications ensue when her boyfriend becomes troubled by the tape and is unable to perform sexually while it is being played.