After a terrifying attack from rival forces, Wren is swept far from home, a prisoner in the heart of enemy territory. Her only solace is Finn, the rebel prince who holds her heart.

Instead of helping her escape, however, Finn keeps her under guard in a tower. He insists it is for her safety. But as her dark magic grows more powerful, Wren's control weakens, and she worries the danger is only creeping closer.

As much as Finn claims to care for her, can she trust him to keep her--and their kingdoms--safe? Or is everything she believes about him a lie?