"Tu seras duchesse!" ("You'll Be a Duchess!") With these words, self-made industrialist Poisson orders his daughter Lucie to marry a wealthy Duke. The duke's father objects to the union, whereupon Poisson arranges another marriage for his daughter, this time to an impoverished and sickly young marquis. Poisson's strategy runs something like this: the Marquis is expected to die soon, whereupon the widowed Lucie will become a marquess, and thus a worthy bride for the Duke. But the Marquis foils these plans by staging a miraculous recovery. The explanation? The Marquis and Lucie have been in love all along, and this was the only way that they could wed with Poisson's blessing. Darned clever, these Frenchmen!.

Hélène is a telephone operator in love with her boss, who has never looked at her. She follows him to the Côte d'Azur and passes herself off as a great lady. Brodier falls madly in love with her.

Valerian writes his uncle, colonial millionaire, for money. He meets a quartermaster, Napoleon, who pretends to be a doctor of law. They become friends.

Remember when Julie Andrews in The Sound of Music says "Every time God closes a door, He opens a window?" Well, this is basically the same philosophy followed by a sage authority named Professor Azais. Though he is never seen in the film, Azais's influences dictates every move made by Le Baron Wurtz (Max Dearly), a private tutor. Though he suffers quite a few setbacks, Wurtz presses on, armed by the Azaiz philosophy that every time something goes wrong in one part of the world, it is balanced by something going right elsewhere. This "law of compensations" pays off in big laughs for the audience, and in a happy-ever-after for Wurtz. Azais was based on a play by Georges Berr and Rene Verneuil.

A young sportsman, heir to a tyre manufacturers wants to end the rivalry between his father's company and their main rival, by marrying the daughter of the rival family.

A brave woman is sentenced to prison on false testimony. She escapes twenty years later and takes refuge in Paris where she carries bread while looking for her children Georges and Lucie who will find her and exonerate her.

A very nice young man, Sylvain Renaud is "surrounded" by two bad guys who want to drag him into some very dirty business.

In 1842, during the conquest of Algeria Sidonie Panache disguised as a Soave runs away with her lover who is doing his military service there.

Lagardère protects Aurore, the granddaughter of the Duke of Nevers whose deceitful Philippe de Gonzague covets the inheritance.

Lucie turns the house of chic dandy Gaston upside down.