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.

Mario
Nicolas
Rita Alvarez
Gabrielle Montaron
Gisèle
Le brigadier
Mr Montaron
Zénaïde
Mr Hyacinthe
Mr Bolivar Alvarez
Félicien Dieudonné
L'habilleuse de Gisèle