Tremendous and glittering, the Space Station floated up out of the Big Dark. Lieutenant Corriston had come to see its marvels, but he soon found himself entrapped in its unsuspected terrors. For the grim reality was that some deadly outer-space power had usurped control of the great artificial moon. A lovely woman had disappeared; passengers were being fleeced and enslaved; and, using fantastic disguises, imposters were using the Station for their own mysterious ends...
Hudson lay in his sleeping bag, staring at the sky. It bothered him a lot. There was not one familiar constellation, not one star that he could name with any certainty. This juggling of the stars, he thought, emphasized more than anything else in this ancient land the vast gulf of years which lay between him and the Earth where he had been-or would be-born.