When a former comrade disappears under mysterious circumstances, Nadia Garrison is summoned to Paradiso to help uncover the truth. But the dangerous secret she and Hayley stumble upon is more than any of the orbiting humans bargained for, and suddenly they find themselves at the center of a terrifying inter-species war, which is only exacerbated by slave politics, rivalry, and jealousy. Nadia and Hayley’s relationship is tested amid the turmoil, while the former slave is forced to battle her own inner demon that lies at the heart of an unchecked science.