Gino, a drifter, begins an affair with inn-owner Giovanna as they plan to get rid of her older husband.
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.
Bruno, a chauffeur having some problem in keeping a job, meets one morning Mariuccia, a taxi driver’s daughter working as a perfumery’s shop assistant, and trying to impress her, pretending to be rich, uses his employer’s car to took her on a trip to the lakes, but things don’t work as planned and to conquer Mariuccia’s hearth won’t be so easy…
