Mario, a star ladies' hairdresser, has Nicolas as a friend and Gisèle as his mistress, who is coveted by Nicolas. To boost the salon's finances, Nicolas takes advantage of a billionaire, Madame Alvarez, by selling her a pseudo-rejuvenation serum invented by Mario. Mario suddenly falls in love with a provincial girl, Gabrielle, and pursues her to the South of France, where everyone meets up to finish the film in song.
A shy, penniless employee of the garage owner Grillot, the gentle Louis wins $10 million in the lottery. Flitting along the banks of the Seine, he takes in Raoul Grandvivier, an unknown, untalented painter who has just botched a spectacular suicide intended to draw attention to himself. Raoul takes him back to his studio, where he meets his charming daughter Lucie. In order to see Lucie again, with whom he is in love, Louis offers to sell the paintings. In reality, he's the one paying for them, to make it look like a wealthy art lover.
Philémon De Montfilet came first in his year in the prestigious engineering school "Poly Art Technique" because of an epidemic which brought all the other examination candidates down.
Françoise Arnould plays here a married woman who decides one day to get away from her husband and return to her childhood place, where she meets all her former friends, and lovers.
Manuel, a landowner in Jamaica, arrives in Paris on vacation. There he meets Olivia, a Spanish popular singer and falls in love. Olivia leaves Paris to play in a casino of the Riviera and Manuel follows her there. Maxime lives in Cannes, uncle of Olivia, a trickster who poses as a magician and has great influence on Annie, an eccentric billionaire. At the same time, Simeon, Annie's secretary tries to bribe the magician to influence Annie to accept to marry him, but as Maxime also wants to marry her, Simeon uses the services of a private detective. Manuel receives a telegram asking him to return to Jamaica. So, Annie proposes them a cruise aboard his yacht and invites Olivia.
