Cashier Maurice Legrand is married to Adele, a terror. By chance, he meets Lucienne, "Lulu", and make her his mistress. He thinks he finally met love, but Lulu is nothing but a streetwalker, in love with Dede, her pimp. She only accepts Legrand to satisfy Dede's needs of money.

Michel Simon
as Maurice Legrand

Janie Marèse
as Lucienne 'Lulu' Pelletier

Georges Flamant
as Andre 'Dédé' Govain

Magdeleine Bérubet
as Adèle Legrand

Roger Gaillard
as Adjutant Alexis Godard

Jean Gehret
as Monsieur Dugodet

Lucien Mancini
as Wallstein

Max Dalban
as Bernard, the colleague

Romain Bouquet
as Henriot, boss of hosiery

Pierre Desty
as Gustave Brocheton