The insectoid Dronon invaders have slain Semaritte, ruler of 10,000 human worlds. Only her clone, Everynne, survives to rally the forces of humanity. Pursued across a multiplicity of worlds, she enlists the aid of Gallen O'Day, a cocky young bodyguard from a backwater planet, along with the beautiful orphan Maggie Flynn and Orick, an intelligent black bear.