Things have changed for seventeen-year-old Zoe ever since the otherworldly events that brought her together with the mysterious bounty hunter she calls X. In order to save Zoe and her family, X has done the unthinkable—he's given up his freedom and returned to captivity in the Lowlands. X is determined to break the lords' hold on him once and for all, but being stripped of his power pushes him toward a darkness he's never experienced and a past he's never known. The secrets that surface could be the key to reuniting X and Zoe . . . or they could mean the destruction of everything they have been fighting for. Gripping and full of heart, this epic continuation of Jeff Giles' series will bring readers right to the edge of everything.