When World War II breaks out, two German lovers are cruelly separated. While he is sent to fight at the front, she, a Jewish girl, is sent to a concentration camp where humiliation and death have been elevated to a sinister art.

Four corrupted fascist libertines round up 9 teenage boys and girls and subject them to 120 days of sadistic physical, mental and sexual torture.

An unidentified fifteen year-old girl is found hanged after an anonymous tip-off. The girl, Silvia Polvesi, is soon discovered to have been murdered. A peeping tom is caught with photos of her having sex with a teenage drop-out but he is later released due to lack of evidence. The investigation, conducted by Inspector Silvestri and the assistant public prosecutor Vittoria Stori, focuses on the girl's parents. It transpires that a private detective, Ruggero Pollente, was hired by Silvia's mother because the latter was concerned about her activities. As a conspiracy begins to emerge, Pollente's body is found dismembered and his girlfriend is subsequently attacked by a machete-wielding killer clad in motorcycle gear...