Stuck in a loveless marriage, bourgeois industrialist Francois falls in love with Janine, another man's wife. Francois sets up Janine as his mistress, and she, mercenary soul that she is, likes the set-up so much that she continues the relationship even when her own husband returns from WW II. In the long run, however, Janine is the loser in the situation.

Set against the backdrop of the 1937 Paris Exposition, a mistaken identity plot where a travel agent from Morocco is confused by the French police with a dangerous swindler.

Jacques de Nisson, a rich man, has a new mistress, Lucie Cavelier. Which does not prevent him from courting Florence, the wife of his lawyer friend Forestier. One day, Jacques is found murdered and chief-inspector Candély is sent on the spot to investigate. Jean, the victim's butler, Lucie as well as Florence are suspected in turns but the real murderer is finally identified thanks to his fingerprints.

A banker threatened by gangsters is replaced by a tramp who is his perfect double. The gangsters arrest the fake banker and take him for a madman.

The family Pont-Biquet is composed as follows: father, the judge, afflicted by deafness; authoritarian and irascible mother; funny son-in-law; an ingenious son who has a mistress.

Gontran is required to marry if he wants to benefit from his aunt's inheritance. To convince the latter in favor of a visit, he calls on the wife of a friend who will play the role of the future wife. This maneuver will cause many misunderstandings.

Narcisse is a doorman for a jeweler but dreams of becoming a private detective. The Criminas agency hires him and he comes to the aid of his former boss's nephew, accused of stealing jewelry. He first passes for the accomplice of the young man but soon discovers the culprit.

After he loses a servant job when his employer's mansion burns down, a yokel makes money entertaining tourists in Breton garb, lands up appearing in a Paris show ,and meets another property owning lady, this one of dubious reputation.

The son of a ruined family transforms into a castellan following an inheritance, becomes a parachutist champion in spite of himself, and becomes famous.

Little Germaine Valcour, an adulterine child, is abandoned and taken in by a showman, Father Ballot. She becomes the consolation of the good man whose daughter has gone wrong. Madame Vaulcour died of grief while her lover, after many bad blows, takes justice into his own hands. The girl stays with her adoptive parents.