When Eugenia Insigna of the Settlement Rotor, an independent space station, discovers an unknown red dwarf star two light years from Earth, she names it Nemesis. Led by Dr. Janus Pitt, Rotor and its population travel to the star to build a new, morally pure society. Insigna's daughter Marlene, who can read body language like a telepath, learns that Nemesis is moving dangerously close to Earth's solar system. After trying to communicate her knowledge, Marlene discovers that a conspiracy is suppressing it