After dying to shatter the Blood Moon, Wolf King Kael awakens in a powerless human boy saved by Aria, heiress of the Moonfall wolves. Two years later, she rejects him as her mate—until he enters the Beast Trial to save her from a slave brand. Their bond breaks his seal, and Aria’s acceptance at the pyre restores the Wolf King. But the Dragon King behind the Blood Moon claims her as his next sacrifice, forcing Kael to risk the world for the one person he cannot lose.