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.
Sunday is the only day off that house maids use to date the young men who cross their paths: doormen, soldiers, sailors, timid virgins and lurid husbands, or even a doctor.
During the fascist era, Adriana a beautiful young model, becomes a prostitute after a love affair gone wrong. She meets Mino, a partisan who falls in love with her and wants to redeem her.
