Valerio, a blind man of war, and his little sister Fiorella live with Uncle Mario, who has a shop on the coast.

Journalist decides to report on Miss Italy candidates, in which detective intrigue is added.

In the prison of San Vittore there is, among other detainees, a strange type that they call "Il Cavaliere". The latter suffers a conviction for theft and his fellow prisoners have a certain respect for him.

After serving their sentence, three prisoners, a doctor, a civil servant and a thief, leave jail. During the train trip they do together to return home, they analyze their respective lives. The doctor has been required to perform an operation on a child abandoned by his father, a millionaire.