The plot weaves several episodes with several groups of people, Roman families, youth gangs and young love couples, who spend a Sunday at the beach of Ostia.
Anna Baldini
as Marcella Meloni
Vera Carmi
as Adriana
Emilio Cigoli
as Alberto Mantovani
Andrea Compagnoni
as Cesare Meloni
Anna Di Leo
as Iolanda
Franco Interlenghi
as Enrico
Salvo Libassi
as Perrone
Elvi Lissiak
as Luciana
Pina Malgarini
as Ines
Marcello Mastroianni
as Ercole Nardi
Anna Medici
as Rosetta
Fernando Milani
as Catone
