In the dark corners of the Lunar habitats, Deena has safety and friends. In the light — danger lurks. To find those responsible for the death of her parents and the disappearance of her friends, she must join those who work in the light — if they'll let her. After all, they're Techies.

Jake has every advantage of a Techie. Head of an elite security force investigating the Utopia drug, he is certain the pushers are the Porters. He needs to find a way to integrate with those who work in the dark, but Techies aren't welcome.

Deena and Jake must put aside their differences and work together against a common enemy — a threat to both Techies and Porters. Along the way, they discover love doesn't care where you come from, and evil has a long reach.