Raised in one of the non-hierarchical nomadic societies on the planet of Germinal, young Char and her family tend to this commons, rich in culture and biodiversity, through principles of reciprocity, ritual, and attention to the balance of their ecosystem. But they must forever travel to stay just ahead of the natural phenomenon that marks their world: a wall of fire that approaches like clockwork, bringing both loss and renewal with it. She is the first to spot the arrival of landing vessels, and soon her way of life is upended by militaristic invaders whose intentions are far beyond her worldview. Graft is a captive "servitor" and personal attendant to the Conquis, the leader of the vanguard forces in the campaign to seize control of the distant planet. As the last survivor of a culture annihilated by conquest, Graft sees how unprepared Char and her people are to deal with the invasion. When one unsettling discovery leads to another, the newcomers find the nature of this new land troubling and its denizens odd--perhaps even nonhuman. The mission soon turns into something more menacing, and the inhabitants of the violated utopia must learn how to defend themselves or lose everything.