In the early 1950s, the popular radio show "La Kermesse aux Étoiles", hosted by the famous Jean Nohain, mixing lottery games and performances of various artists, will be disrupted by the adventures of a man and his fiancée seeking to recover a dangerous bottle of perfume (explosive) which was unfortunately mixed with the prizes to be won ...

Guy de Kerentrec est un jeune héritier oisif. Au casino il ruine littéralement le prince arabe Ali Bey qui voulant se refaire se retrouve avec une énorme dette de jeu. Ce dernier promet de rembourser dans quelques jours quand il aura trouvé l'argent.

Jacques is a jolly bachelor who lives a wild life with his a mistress Wanda and all he wishes is to go on living the way he does. But Father won't allow. He demands that Jacques get married. More or less reluctantly, Jacques decides to comply but on the way to his father's home - where he is to meet the bride Dad has chosen for him - the young man comes across the charming Simone and falls in love with her at first sight. He elopes her, determined to ignore his progenitor's orders. Little does he know that Simone, the girl of his heart, is none other than the one he was supposed to marry...