In this adaptation of the Greek myth, Hercules (Lou Ferrigno) – a semi-divine being – squares off against King Minos (William Berger), who is attempting to use science to gain power and take over the world. With the help of a benevolent sorceress, Circe (Mirella D’Angelo), Hercules tries to save his beloved Cassiopeia (Ingrid Anderson) from being sacrificed by Minos and struggles against laser-breathing creatures and an evil witch (Sybil Danning).
Lou Ferrigno returns as the man with the strength of a hundred in this action-packed sequel that finds the fabled warrior facing his greatest challenge.
The Greek god Zeus has lost his seven mighty thunderbolts, all of which were stolen by jealous Olympians. The world is in disaster. The moon is knocked out of its orbit and is hurtling towards the earth. Urania and her sister Glaucia figure the only way to save the earth is by calling upon the mighty demigod Hercules to return the thunderbolts to Mount Olympus. But each of the thunderbolts are hidden inside of a monster.