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 sorceress (Sybil Danning).