The fanatical son of a Nazi General leads a squad of German commandos, disguised as American Troops, behind the lines in order to sabotage the Allied Forces.
Lyane is a singer and daughter of the producer of the operetta: "C'est une fille de Paris". She convinces the composer of the music, Jacques Kellermann, whom she loves, to sign her piece. The famous composer Jean Paget, who cannot put the work to his advantage, declares to Jacques that Lyane had a child by him. Shocked, Jacques breaks with the singer who soon knows the celebrity. Finally, he realizes that happiness is ready to be seized, because the beauty still loves him...
Whistle is an orphaned boy, raised in an environment unsuitable for a budding child and thief. A shady lawyer, an accomplice of thieves and fences, entrusts him to Nino, the leader of a gang that is preparing a particularly valuable coup.
When peasant girl Nives is deserted by smuggler Gino Lodi, she betrays him to the police. Police officer Enzo Cinti, who loves Nives, traces her to the Po River cane-fields, where she is working as a cutter to support herself and an infant son, and warns her that Gino has escaped from prison and is seeking revenge. She rejects his offer to protect her. Gino finds Nives, mourning the drowning death of their son. He surrenders himself to the police and then walks at Nives' side in the funeral procession.
Dante Trilli, who has been teaching in his village school for about twenty years, wins a competition for Milan. Waiting for him is his childhood friend, where he is the janitor in the school where Trilli will teach.
A drama teacher works as an extra in the cinema: he has to milk a cow. Left alone with the animal in the studio, he is forced to bring it up to his apartment. The police, the Humane Society and the government get involved.
In Paris, three models are murdered, being one of them the mistress of the fashion designer Dominique Airelle. It is the young inspector who is in charge of the affair.