The exciting conclusion to the Achlivan Cycle! Timber Hudson must come to terms with the loss of his family and friends while at the same time being tasked with his greatest challenge: saving humanity from becoming mindless drones. It'd be a lot easier if Rumor would keep her nose in her own business and in prison where it belongs. Meanwhile, Chevelle and Wicken must choose sides. One offers them the chance to rebuild Earth from the ground up, and the other will return them to Sanctuary to be with their family and friends. Neither choice is as black and white as it seems. And all must face great dangers.