For her birthday, Jedda enters the family treasure of the Skull Cave to choose her present. Influenced by the telekinetic powers of Graviton, an evil alien of pure energy from a cruel dimension, she picks the Necklace of Oros, the necklace giving Graviton the ability to harness his vile power. The villain contacts the evil emperor from Ice Station Earth Ming, and pact is made in which he will turn over the secret of his anti-gravity device when Ming delivers Jedda and the Necklace of Oros to him!
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