Two foster teenagers struggle to integrate into the world of Narth from which they were born but have never known. A world among the stars, powered by celestial light, and is the last defense for Earth against shadowy evils that linger from ages past. Their Mother is earth-bound by a mystery ailment, and they know nothing about their native-home. But by fate, they are launched into the skies, where they are given a chance to save their Mother and possibly themselves.