Marseilles, 1919. Georges Sarret is a distinguished and respected lawyer, recently honoured for his services in the First World War. He takes as his lover Philomène Schmidt, a young German woman, who has just lost her job and home. To enable Philomène to remain in France, Georges finds her a husband – who dies conveniently of natural causes a month after the wedding. Georges repeats the trick with Philomène's sister, Catherine – marrying her off to an old man who dies suddenly so that the scheming trio can profit from his life insurance. When an accomplice in the scheme, Marcel Chambon, threatens to blackmail them, Georges and his two lovers have no option but to kill him and his mistress...

An unconsummated marriage to fool the father who wants his heir to be wed.

Jojo’s ambition is to become a gangster, but to be admitted into a gang he has to prove himself by committing a daring act. To that end, he kills someone in broad daylight, not knowing that his victim is an actor who is playing a scene in a film directed by a cranky film-maker (Darry Cowl). The murder is caught on film, leading Commissaire Bernard (Michel Simon) to think that the killer will be easy to find. Sure enough, Bernard soon makes his arrest, a clown from a circus, but then he faces an almost insurmountable problem. The clown has an identical twin, who is also a clown with the same circus. Both men claim to be innocent…

Marie, a young bourgeois and Jean, a cargo sailor have an affair, she becomes pregnant but he has to go back to the sea. Marie leaves for Paris where she meets Pierre and marries him. War breaks out, Jean and Pierre will befriend each other on the front.

Catherine's technique to sell her clocks is to blackmail illegitimate couples such as Jacques and Gisèle. However when Gisèle's husband Pierre walks in on them, Catherine pretends to be Jacques's lover to save the day. Jacques then gets caught up in her schemes when the next couple she deals with turn out to be jewel thieves who kidnap them.

It's a sailors' story; they often sail away and when they return, the first thing they do is searching girls in the harbor. One of them -Jean- is shy and he does not know how to go with women. One day, he meets Yvonne and falls in love with her. But, alas, she prefers his good friend René. Another suitor, Pierre, owns the "À la Belle frégate" a café where Yvonne works as a waitress. Madam(e )Juliette, pretends she helps Yvonne and tries to make her an "entraineuse"(hostess) for less-than -handsome guests. But the girl knows better and will choose one of her suitors.

Claude, who temporarily replaces his father at the head of a department store, falls in love at first sight with a pretty female customer. He finds out that she is named Solange and that she is the goddaughter of Professor Hauteclerc, who runs a private psychiatric hospital. To come closer to the girl of his dreams, Claude has a crazy idea: he pretends to be mad so as to be placed in Hauteclerc's institution.

The director of a private institution is the father of seven charming young girls. He has money worries. A rich bachelor, still young, a few years ago advanced him a large sum of money. He makes frequent visits to his debtor; the poor father, as mediocre a psychologist as he is a poor businessman, hammers himself in his head, not guessing that the visitor is reluctant to make his choice between the seven sisters.

An opera singer is stricken with amnesia and, on the evening of a premiere (in his stage costume which is that of a tramp), he goes to wander with real tramps.

A debate on the definition of the word laughter, organized by Madame de Saint-Jules and two academicians, illustrated by film extracts, turns into a huge battle of cream pies.