A middle-aged playboy becomes fascinated by the daughter of a private detective who has been hired to entrap him with a client's wife.

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.

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.

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.

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...

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.

In Saigon, the heads of the French counter-espionage network replace the secretary of dangerous traffickers with one of their agents to uncover a trade in bacteriological bombs.

In a maternity hospital, young single mothers are accompanied by social worker Hélène Lambert, who tries to make them aware of their new responsibilities, while Dr. Baurain stresses the importance of their moral and sexual education. They come to the aid of several young women: one who would like to give up her child to a couple applying for adoption, another who, after the death of her first baby in dramatic circumstances, is expecting a second, and many others.

Lise is bored with her parents and gets a job as a waitress. She meets a sailor, Fausto, who leaves her to escape from the police. Nevertheless, she gives birth to a baby who dies shortly afterwards. Distraught, she steals a parentless child from a maternity hospital. Arrested and tried, she is acquitted, only to find Fausto innocent.

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.