Everything Sybil Wyntres believed is a lie. The rune etched into her body, the magic she can't control, even the order she once trusted. None of it is what it seems. Forced back into the Bastion she barely escaped, Sybil is sent across the fractured lands of Crae Vost with an ancient enchanter whose motives are as obscured as the truth she seeks. As whispers of the Void spread and their horrors grow less containable, Sybil begins to uncover a terrifying possibility: the enemy may not be what she was taught to fear.
Far beneath the world above, Raekin has lost everything. Dragged back into the Alpstraum by the noose he thought he had loosened, he is once again bound to the wire that broke him. All because he chose her. Now, marked by failure and forced into obedience, Raekin is sent to hunt the one person who may be able to unleash the nightmare of the Void onto the continent.
As their paths pull them toward the same unraveling mystery, Sybil and Raekin race against each other and the forces that control them to uncover the truth behind the tome that tore them apart. But in a world built on control and cruelty: knowledge is dangerous. And choosing the wrong side may cost them not just their lives, but the lives of those living on the surface.