You never can tell. Jean had always been one of the most confirmed bachelors that kept swearing to anyone that would listen he would never put a ring on a female finger. But that was before he met Juliette, a capricious but irresistibly lovely young woman. Well, what else can you do when you fall dead in love with a creature of the kind? And too bad if their honeymoon proved catastrophic. To say nothing of their housing problems : what to do when neither husband nor wife has any money? How to build one's love nest when the housing crisis rages? How to get by when your wife has luxury tastes?

Two young Parisians, Raoul de Gardefeu and Bobinet, are in love with Metella, a beautiful young woman aspiring to high society. Metella rejects them both in favour of a richer and older man.

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.

Two middle-class couples compete with each other by providing false information about their respective situations in order to dazzle each other into marrying their two children.