After serving prison time for a juvenile offense, Freddo gathers his old buddies Libano and Dandi and embarks on a crime spree that makes the trio the most powerful gangsters in Rome. Libano loves their new status, and seeks to spread their influence throughout the underworld, while the other two pursue more fleshly desires. For decades, their gang perpetrates extravagant crimes, until paranoia threatens to split the friends apart.

Kids from a huge apartment complex in Rome form a secret society to unite their forces and get back at the nasty adults who 'oppress' them, playing pranks on them to expose their weaknesses.

Michael Woods stars as Tony Giordani, a narcotics agent who learns that his wife has been murdered while he is recuperating from an attack by a mysterious stranger. His boss thinks it's a Mafia vendetta, but Tony follows the clues to an empty house which his wife had been photographing on the day of her murder. There, he finds a burned corpse and several clues leading to the Full Moon Killer, who has been decapitating prostitutes around the city. The owner of the house is an insane countess, whose escape from an asylum leads to yet another murder. Before long, Tony and his partner, Lisa, with whom he is engaged in a passionate affair, find themselves targeted for murder unless they can solve the case.

A homicide detective realizes that the brutal murders committed by a mysterious serial killer he's after have something to do with the late husband of a beautiful widow.

At the beginning of the 20th century, a junior resident takes an interest in a newly-arrived patient, a young Italian woman who has mysteriously developed schizophrenia. To identify the causes of her condition, he employs psychoanalytic methods to dig into her sexual past, despite objections by the old-fashioned chief physician.