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.

Four episodes set on the beaches of Rimini: a womanizer pretends to be homosexual in order to gain the favors of a beautiful woman who ignores him. A mature beachgoer suffers from indigestion. A businessman unknowingly finances his wife's infidelities. Two wives from the south are forced to exchange partners.

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.

Stefano is a young mechanic who would like to become a discreet boxer by faithfully following the advice of his wise uncle: but in his life Giulia appears, a good girl who happens to be present at a meeting of our hero who immediately falls in love with her

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

A gang of thieves are robbing luxury apartments in Rome, but after emptying the villa of the wealthy Mr. Douglas, the thieves are beginning to die.

Undercover cop Nico Giraldi is once again transformed, now as a trucker in a criminal gang.