A crime has been committed. Two police officers with very different personalities are in charge of the investigation. This one turns out to be complicated, the culprit being almost unsuspected.

Two phony fortune tellers get mixed up with gypsies.

Monsieur Loyal, bailiff by profession, is dispatched to a grub by an actress. Reason: she accuses Micheline, a young singer who works there, of stealing her songs. But our usher is nonetheless a man, and Micheline exerts her charms on him so well that he gives him shelter for the night, and finds him a new job at the Mirador, a cabaret that has just opened.