 By answering a seemingly impossible riddle, Perseus, the son of Zeus, wins the hand of the Princess Andromeda in marriage. Trouble appears in the shape of Calibos, the princess s former love, and his mother, the Goddess Thetis. In order that the dreaded Kraken not be released, Andromeda has to be sacrificed and Perseus searches for the Medusa; her head is the only thing that can stop the Kraken.