The manager of a firm has a very unusual idea : asking his employees to pose as gangsters and to hold up a bank before returning the stolen money and pocketing the reward. But things do not go according to plan and the phony thieves get stolen in their turn. They have no other choice than turning into amateur detectives to be able to pay back the stolen dough.

The evocation of Paris in the 1920s mingles with the rapid rise of the irresistible Caprice, a talented singer, and her tumultuous love affair with Jeff the composer. A photographer nicknamed Bagnolet, a gentle anarchist, gently monitors the activities of Caprice, who has become Lady Paname and, in the absence of morality, makes love triumph.

Envoi de Fleurs is based on incidents in the life of French composer Paul Delmet. Played by popular French singing star Tino Rossi, Delmet is depicted as a man all too willing to give up personal happiness in favor of blind ambition. After carrying on a romance by correspondence with beautiful young Suzanne (Micheline Francey), Delmet is on the verge of marrying the girl. Instead, he allows himself to be talked out of leaving France to further his own career, with disastrous results for all concerned.

A beautiful young pianist falls for her mentor.

Catherine's technique to sell her clocks is to blackmail illegitimate couples such as Jacques and Gisèle. However when Gisèle's husband Pierre walks in on them, Catherine pretends to be Jacques's lover to save the day. Jacques then gets caught up in her schemes when the next couple she deals with turn out to be jewel thieves who kidnap them.

A little bank employee wins a plane in the lottery and amazes his companions with his audacity.