Antonio, Peppino and Lucia are three brothers who live in the country near Naples. Lucia's son, Gianni, goes to Naples to study medicine, but there he knows a ballet dancer. They fall in love and, when she goes to Milan, Gianni follows her. Informed of this and afraid that their nephew will stop studying, the three Caponi brothers leave for Milan to persuade Gianni to come back and continue studying and abandon the "Malafemmina" (bad girl).
Antonio and Peppino live in a small town in central Italy: Peppino is the barber, Totò is maintained by the rich but avaricious wife Teresa.
Agnese has many men who woo her and live with her cousin Cesira, who has the opposite problem with men and wishes she would also have men woo her.
