Sasha Voronin, a famous singer about to marry supermodel Nathalie, falls victim to John Darow, who attempts to murder him by knocking him out and throwing him into the sea. Sacha is taken in by fishermen, but he has lost his memory and takes the name Samson. Samson's memory begins to awaken when he hears a familiar tune during a circus performance, and begins to sing. Deciding to leave with the circus troupe, he ends up being hired by the director of a radio station, who launches him on the air under the name of "unknown singer". Nathalie, meanwhile married to John, recognizes his voice and wants to find him; Sacha rejects her because he has fallen in love with Maria. John again tries to eliminate Sacha, then attempts to kidnap Maria. After a mad chase, Sacha defeats John, who is arrested by the police.

Henri Verdier, a young bank manager, has made the acquaintance of Karine, a model of great beauty. Robert, who claims to be Karine's brother, forces Karine to introduce him to Verdier. This is to offer him an urgent business deal: 50 million for a uranium purchase which, within a few days, should yield double that amount. Blinded by passion, Verdier accepts and "withdraws" the necessary sum from his bank. He soon realizes he's been duped. Karine is not Robert's sister and Robert is a crook. Verdier tracks them down.

Alphonse flees to Paris to escape his wife's despotism. Intoxicated by the frenzied pace of Parisian life, he ruins himself completely. During a nightclub outing, some hoodlums mistake him for Al Gregor, the king of the underworld.

Philippe de Valmont, an important Banyuls wine producer, asks his friend Patrick, an attractive adventurer, to take care of Desirella, a cover girl very much in demand, who has an affair with her lesbian friend, Nicole. Patrick carries out his mission so stylishly that Desirella soon falls in love with him. Nicole, as for her, doesn't accept the situation. She is determined to seek revenge.