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).
Totò
Peppino De Filippo
Dorian Gray
Teddy Reno
Vittoria Crispo
Mario Castellani
Nino Manfredi
Linda Sini
Salvo Libassi
Luisa Ciampi
Corrado Annicelli
Edoardo Toniolo
Gianna Cobelli
Donatella Randisi
Gino Ravazzini
Delia Orman
Lamberto Antinori
Gianni Partanna