On the ravaged homeworld of the Santovasku, Earthman Tetsuya Wakatsuki lies dying, struck down by the sword of his brainwashed alien bride, Kahm. As the sight of her mortally wounded husband shatters the mind control of her father, the Santovasku Emperor, Kahm realizes she has but one chance to save Tetsuya--she must tap into the fiery energies of the planet itself and battle her father to the death!