Federico, his girlfriend Laura and her cousin, Caterina, are three young people full of hope, united by a great friendship that seems indissoluble. The three work in a department store but, when Caterina decides to attempt a musical career, given her vocal skills, everything changes. Caterina becomes a successful singer and Federico falls in love with her. Caterina, who however does not want to make her cousin Laura suffer, pretends not to reciprocate the young man by making him put his head in order. Meanwhile, the plots of various secondary characters evolve, in particular the fresh marriage between the security guard Antonio and the secretary of the department stores Adelina.

Giulio and Armando, both married, attempt an escape from their respective married lives, invent a secret mission and leaves for the south.

Four former soldiers meet and reminisce about the time they were in active service: a parachutist mistaking his sergeants house for a brothel, a hypnotized sailor who thinks he has changed his sex, two GIs captured by an African tribe.

A man discovers his wife's infidelity and kills her lover.