Puzzle

Following the mysterious decapitation of an insurance investigator, Police Inspector Peretti is put onto the case, but all the clues lead to an unsolved case of kidnapping and murder.

A schoolgirl was murdered seven years ago, and the case was never solved; now, the murderer seems to be back.

While hunting a cultured and vicious psychopath, detective Amaldi faces the physical and moral decay of his city as well as the ghosts of his past.

A high-rise apartment populated by models, nightclub dancers and call girls becomes the focus of a mysterious serial killer. When a young model named Jennifer and her friend Marilyn move into one of the victims' former apartments, Jennifer becomes the next target and the pair try to identify the killer.

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. Conspiracies and horrors pile up, as do the body parts.