A florist in a nightclub in Montmartre, a good, naive man is manipulated by a gang of gangsters who use him to smuggle drugs.
A poor boy, having consented to play the role of the victim in a fake car accident story, is also invited to marry in the place of his crush who wishes to keep his freedom.
Prosper, the accountant of a fashion house, takes a vacation to Monte Carlo without his wife Sabine. And if he goes alone it is for a very good reason: he has a rendezvous with Olga, a beautiful woman. Once in Monte Carlo, he wins a large sum of money at the casino. Unfortunately for him he immediately becomes the prey of three gangsters who proceed to relieve him of his newly acquired fortune.
