In the far distant future, hideous monsters roam the Earth, threatening the lives of all people. Genma, the evil ruler of the Mah tribe, has become obsessed with fathering an Heir. Convinced that a child born of a Hito woman will have amazing powers, he sets his sights on a young woman named Non. In exchange for her village's safety, Non agrees to bear Genma's child. She gives birth to twins and names them Loof and Jin. Jin is left for Non to raise among the Hito, as Loof is taken to Genma, and raised to be the prince of the Mah tribe.