Four thirtysomething university students share a flat in Florence: Leonardo pursues beautiful Letizia, her brother Rocco works night shifts to pay for his rent, Bruno has to graduate to inherit his father-in-law's business (while cheating on his wife with her sister), and Pino dreams of becoming a stand-up comedian.
The director of a detective agency discovers a jewellery thief likes to attends the theatre. So he hires two clumsy and bumbling detectives to guard all the theatres in the area. The two investigators now go from one venue to another attending various Italian magazine shows.
An inhabitant of the Moon, crashed on the Earth due to the violent shock caused by an atomic experiment, remains amazed by the discovery of this planet and gives life to a puppet, begging him to introduce him into the world of men.