A black-out occurs during the meeting of a gang of criminals. When the light is back one of them is found killed with a stab on his back and all the clues point to a penniless man who had an argument with the victim a short time before the murder.

A police inspector is called to Milan to investigate a murder case since he grew up in the same ghetto as the suspect.

The officer Nico Giraldi investigates a homicide which has taken place in a Chinese restaurant in Rome. His wife and his son are kidnappeded by the murderer in the course of the inquiry. In the end the case is worked out.

While keeping an eye on his small time crook brother in law, Inspector Nico Giraldi gets involved in a murder case set in the world of Formula One racing. Giraldi is suspended for trying to cover up for his brother in law and becomes afraid his wife and son may be targeted next. Therefore he calls in the help of his childhood friend and chief informant, Venticello.

Rome, Italy, early 1980s. A guy who worked at the Blue Gay, a transvestite cabaret, is found murdered, strangled. Marshal Nico Giraldi is responsible for investigating, infiltrating the Roman Gay community.

The upright prof. Filippo Bottini Said Pippo is an "old-fashioned" teacher in a Roman school. He would like a Heart book-style school but clashes with the harsh reality of modern teaching and in particular with the turmoil of the seventies: strikes, occupations, armed students, feminist colleagues. Overwhelmed by events, he will find himself more and more in the maelstrom of the post-1968 protest until he becomes a drug courier. He will be arrested and incarcerated, but thanks to the release on bail provided by his colleague Lalla, with whom he had in the meantime started a relationship, he will be able to redeem himself.

A Milanese industrialist goes to Rome to bribe a politician but he loses money. A thief helps him recover them. Milan and Rome in comparison in the duets of the couple Pozzetto-Milian.

The history of Rome revisited by the group of Bagaglino (Franco, Montesano, Castellacci and Pingitore). Romulus kills Remus, but also manages to get rid of him. The sister continues to bother him in the ghost robes. When Romulus founded Rome and abducted the Sabine, dies, hell, he is received, needless to say, the petulantissimo Remo.