After the Mogadorian leader is struck with a potentially fatal blow, it becomes uncertain who will step in for him and how the Mogs should proceed with their invasion of the planet. This power vacuum has wide-reaching ramifications. One Mog, who has been on a quest for redemption ever since she first let the Garde slip through her fingers, is given an unimaginable opportunity to make things right with the Beloved Leader. Another, who has an unquenchable thirst for blood, jumps at the opportunity to hunt down the human teens who have begun to develop Legacies. And the last Mog, who has been questioning everything since he crossed paths with Adam, is forced to decide once and for all where his allegiances lie. While the fate of the Mogadorian leader is unknown, the one thing that is for certain is that this war is coming to an end . . . and there can only be one side that wins.
The first part of the book is narrated by Phiri Dun-Ra. She witnesses Beloved Leader Setrákus Ra get impaled through the chest. Dragging him aboard The Anubis, Beloved Leader gives her a final order: "Crush them." They attempt to follow the Garde's ship, but it escapes over Texas. Phiri asserts her dominance over the Anubis by executing a Trueborn Mog who questions her authority. They make it to Hawks Nest, where Phiri meets Dr. Zakos.