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.
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