The story takes place on a planet where the inhabitants are descended from humans who were transported there centuries ago. The society has evolved into a complex hierarchy with different castes and classes. A young man, a member of the lower class, discovers that he has a unique genetic trait that makes him immune to a deadly disease that is sweeping through the population. He becomes embroiled in a struggle for power as various factions vie for control of the planet's resources. The protagonist must navigate this treacherous landscape and confront the moral implications of his newfound status. Along the way, he uncovers secrets about the planet's history and the true nature of its inhabitants.
By Poul Anderson · First published 1975 · Genre: Science Fiction, Dystopian, Philosophical Fiction