The Goblin Market has always been the center of Sin's world. She's a dancer and a performer, secure in her place. But now the Market is at war with the magicians, and Sin's place is in danger. Exiled from the market she loves, Sin is thrown together with Nick and Alan--whom she's always despised.

Alan has been marked by a magician and can be tortured as the magician pleases. As Sin watches Alan struggle to continue to protect the demon brother he loves, she begins to see him in a new light. When Alan is finally possessed as a punishment for Nick's disobedience, Sin can only watch helplessly as the boy she has grown to love is destroyed. No one ever comes back from a possession--ever. But no one else has a demon for a brother. How far will Nick go to save Alan? And what will it cost them all?