23rd century Earth exists in a fragile apartheid between humans and vantarians, the extraterrestrials who restored Earth after its apocalypse. Well-meaning but misinformed Alder Brites is aiming to finish their mandated service to the human military without incident when they meet the vantarian Sefynne Iyed, an alleged terrorist who raises questions Alder can't answer. Sefynne, reserved but passionate, is striving to correct the power imbalance on...