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.

A young girl from the provinces ends up in Paris and falls into the vicious circle of prostitution, before resolving to denounce her torturers to the police.

François is the benefactor of the town; but later on, all the inhabitants turn against him.

Complicated intrigues fester in the warmth of Segnac, a charming village on the Cô te d'Azur. The hô teliers' daughter, Violaine, has only a few months to live and loves Blaise d'Orliac, who is closely watched by his mistress Michèle. Old O'Hara is platonically in love with Violaine and encourages Blaise's meetings with the young girl. Michèle interferes. Blaise kills her. O'Hara believes Violaine is guilty and wants to accuse himself. Violaine, on the verge of death, exonerates Blaise. M. Dautrand, who was playing the part of a holiday painter but is really a police officer, decides after reading the girl's diary to leave Blaise in peace. Violaine dies happily.

Stationed in Scotland, Maj. William Darby and the men under his command are trained by British commandos, becoming the U.S. Army's 1st Ranger Battalion. Their drilling period is rigorous, but the men find time to romance local women before being deployed to fight the Nazis. U.S. forces battle from French North Africa to Italy, but when a surprise attack decimates the 1st and 3rd Battalions at the Battle of Cisterna, Darby and the 4th Battalion must come to their aid.

The renowned theatre manager, Paul Rémy, is accused by his general secretary Andrieux of having killed his partner. On the advice of his wife Mona, Paul goes into hiding in a psychiatric hospital to escape from the police. But Andrieux seduces Mona who then turns against her husband.