During his military service, the young singer Gianni Traimonti falls in love with Carla, the marshal’s daughter.

Two jerks are enlisted in the Italian army during W.W.1 and by pure luck manage to help win an important battle.

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.

A girl is drafted due to a misunderstanding and this gives her the occasion to check on her boy-friend, whom she believes to be a womanizer.

A university student, Mario Buongiovanni, tries to do various jobs to pay for his studies: selling encyclopedias, singing in night clubs, being a tour guide. He then became a science teacher in a female college, where he met Lisa, the daughter of a Lombard industrialist, whom he fell in love with. But Lisa’s father, unfortunately, already has in mind for her a marriage with a very rich suitor …