Lord Commander Grayson St. Clair has guided the Tellus Ad Astra to a part of the universe no human—and possibly no race known to Man—has ever seen. Far from the worlds they know, the colony ship is on its own, facing . . . something that seems to have no weakness. Something whose sole purpose seems to be devouring civilizations.

With both time and space as enemies, St. Clair must figure out a way to explore this new corner of space, maintain military order on a mission that was supposed to be civilian, and—somehow—bring the Tellus Ad Astra back to the Milky Way.