Dr. James Driscoll, a specialist in extremophiles, departs on the spaceship Demeter for an interstellar terraforming mission. The ship crashes wide of its target on the barren planet RO-5, and Driscoll is the sole survivor.

In the months that follow, Driscoll learns that he is not alone, for the goddess Demeter has a daughter, Persephone. The two are marooned on the planet they now call “Rogue,” and their spiral through time, space and Persephone’s programming leads them to the discovery of their ultimate purpose.