Perseus (Harry Hamlin), son of the Greek god Zeus (Laurence Olivier), grows up on a deserted island. His destiny is to marry Princess Andromeda (Judi Bowker), who will someday rule the city of Joppa. But as long as the satyr Calibos (Neil McCarthy) — who uses a giant vulture to kidnap Andromeda’s soul every night — is alive, no one can marry her. Perseus travels to Joppa, where he must defeat Calibos and other mythological monsters to rescue Andromeda.