When the solar system passes through a vast cloud of dark matter, strange things start to happen. Electronics go haywire, unbreakable materials suddenly break, and enigmatic, ghostly creatures are sighted. To the inhabitants of Earth this is bad enough, but on Mars, where properly-functioning technology means the difference between life and death, this spells disaster on an unimaginable scale.
Jared Miller, a psionically talented problem solver, barely survives his journey to the Red Planet on his mission to discover just what these mysterious ghosts of the void are and what they want. There, he meets Bo Greene, a prospector who scours the barren wasteland in his six-legged walker in search of mroom, the only life native to Mars. Along with Bo's ex-wife Anissa, Anna the witch and several others, Jared and Bo find themselves transported to the distant future where Mars is green and vibrant but the inhabitants are under the domination of alien overlords and their sadistic psionic henchmen.
Survival becomes their primary goal as they seek to save two worlds, but in the end they face the terrible dilemma of having to choose which to save and which to condemn to non-existence.