A trio of criminals gradually become entangled in theft and crime. Serge is arrested, his mistress, Hélène, and his accomplice, Michel, both become lovers, try to exonerate him and use false fingerprints first, then after Serge's conviction, gloves covered with the same fingerprints of the prisoner.

L'Ange rouge is a cabaret run by a former mobster with his friend, a singer and dancer he brought back from Argentina. A fleeing gangster takes refuge in the cabaret. The singer and the gangster have an affair.

A couple of dancers performs in a night club. The man is jealous of Gina, his partner,and keeps making scenes to her, going as far as bullying her on the stage during their act. A man gets killed. The dancer is suspected for being jealous of all the other men. Another potential culprit could the father of Gina since he overprotected his daughter. The real culprit will be unmasked after the police detective finds the murder has something to with the Occupation period.

The cinematographic illustration of fifteen cheerful, tender or ferocious songs that made the success of the songwriter of the comedian Noël-Noël. After "Les casses pieds", "La vie chantée" stages several sketches of daily life where everyone can recognize themselves and laugh about it.

Marinette, the wife of Mario, a sympathetic hobo, is disgusted with the farm and runs off to Paris without husband or child. The tenacious husband sets off in pursuit, accompanied by the baby and a cow that's a bit cumbersome. The unfaithful woman wanted to become a star. Mario and his crew go from music hall to nightclub until finally, a classified ad brings back a repentant Marinette, just in time to prevent Mario from running off with a prostitute, herself eager for a change of scene.

Mario di Donati, a deserter from the Italian army, lives in Paris under a false name with Germaine, his French lover. When the latter learns about his hidden past, she feels hurt by Mario's lack of trust in her and she distances herself from him. In despair, Mario surrenders to the law but, at the time of trial, he runs away to join the woman he loves.