Gangster Joe Castagneto is declared undesirable by the U.S. government and returns to Naples where, under a special surveillance, he will have to deal with the hard-working and smart Police Commissioner Gennaro Di Sapio.
Antonio, a former variety actor, keeps his daughter in an excellent boarding school by organizing small scams with his friend and colleague Felice. Commissioner Malvasia good-naturedly persecuted him. When their respective unsuspecting children fall in love, the two fathers make peace.
An anthology presents three storylines, all set in the Italian town of Treviso: A husband pretends to be impotent as a cover for having an affair; a bank clerk abandons his wife for his mistress, but the rest of the town's husbands become jealous and unite to conspire against them; and local men all seduce a promiscuous young woman, but when her father eventually reveals that she is underage, they all face prosecution for statutory rape.