In the twenty-third century pioneers have escaped the crowded earth for life in self-sustaining orbital colonies One of the colonies, Rotor, has broken away froade utopia around an unknown red star two light-years from Earth: a star nairl has learned of the dire threat that nemesis poses to Earth&39;s people--but she is prevented fro theers Rotor as well And so it will be up to her alone to save both Earth and Rotor as--drawn inexorably by Nemesis, the death star--they hurtle toward certain disaster