A doctor disbarred for euthanasia is called in by a man to help his son, who has been depressed since the suicide of his partner. But in the dead woman's handbag, an undeveloped film is discovered by the doctor, who decides to investigate the young woman's alleged suicide.

A police commissioner in a little town in the Italian Venetian province investigates a prostitution ring run by two pensioners; during his investigations he also learns that a former manicurist shacks up with ten students, the prefect's daughter prostitutes to keep her pimp, a famous doctor has sex with his young patients, a headmaster has his eyes on the pupils, a noblewoman organizes orgies in her villa, the local convent is run by a lesbian and his actual girlfriend poses for a hardcore magazine. He wants everything to come out in the open but his superiors try to put obstacles in his way.