Gaston, nicknamed Pilou, has left his native village and Yvette, the girl of his heart, to go to Paris where he has found work as a painter. He is a naive good-natured man who, like most of his fellow-workers, favors a little song or two while he works. For the time being he is busy repainting the exterior of a block of flats and, when he does not sing to pass the time, he looks through the windows, observing the tenants in their daily lives. As time goes by, he goes as far as intervening and changing the course of their lives. In the end, despite having found a lookalike of his fiancée, he returns to her.

For love, the singer Georges Hyverlin gives up his profession to work with his father-in-law in his car factory. When the passion for song takes him back, he manages to resume his career thanks to the support of his wife Martine.

Isabelle is a lawyer who has Flip, a private detective, convicted of speeding. But shortly after, a murder is committed of which Isabelle's best friend is suspected. To save her, Isabelle is forced, despite her reluctance, to ask Flip for help, who agrees to look for the culprit.

While investigating the world of Parisian tramps, journalist René Savary, himself disguised as a poor beggar, notices the strange behavior of a little boy. He follows the brat after he has sneaked out of a barge, catches up with him and takes him to his home. There, the kid tells him about himself : his name is Jean, his mother has disappeared and since then he has been left to fend for himself. Moved by the lot of the wretched boy, Savary, with the aid of his friend Pierrot, undertakes to solve the mystery.

A compilation of segments covers the seven deadly sins of greed, wrath, envy, pride, lust, sloth, and gluttony.

Based on the novel of the same name by writer Edouard Peisson, this Jean Delannoy film display one boy’s unconditional love for his mother, despite her tragic mistreatment of him. After being raised by a shepherd for the past 12 years, Simon (Pierre-Michel Beck) is reunited with his mother Marie (Madeleine Robinson). Marie is a prostitute in Marseilles and is now stable enough to welcome Simon back into her life. Unaware of her profession at first, Simon is happy to have his mom back, but in time he learns how she makes her living. This troubles Simon but he continues to love her, despite not loving her chosen profession. His anger toward this issue gets directed toward Marie’s louse of a boyfriend, Paul (Frank Villard), and the result is a heartfelt tale about love and family.

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.

Lucien Bonnet, Jean Vigneron's manservant, blackmails his boss, who is having an affair with Inès de Montalban, married to Ricardo. Vigneron pays the sum but Lucien is killed by an accomplice, Baruch. Everything seems to accuse Jean who, for fear of compromising Inès, prefers to keep mum. Fortunately, his innocence will be proved thanks to a surprise witness. The two lovers flee to Congo while the husband soon forgets them, finding comfort in debauchery.