When you get a message from deep space, should you answer? 
Earth has cause to believe that the universe is not a friendly place. But one woman, a singer well past her performance years, and seeking one last adventure, funds the mission that will accept an ambiguous invitation. . . to the stars. 
Bailey Shaw chooses the young and untested Anton Prados to lead the interplanetary expedition. But when they make first contact with the alien Dassa, she and Anton receive a troubling reception. The Dassa appear human. But they are badly altered humans, and the crew increasingly finds them disturbing, even revolting. And the Dassa in turn are appalled by them. As Bailey makes inroads with the commoners and Anton navigates the intrigues at court, the clash between the cultures escalates, bringing the crew, one by one, to the most difficult choice of their lives. To survive, they must unravel the mystery of the Dassa, and of human—and alien—existence.