Jeremy's cousin has been captured by the church and imprisoned, accused of being a demon. When the escape plan doesn't go according to Jeremy's planning, they are forced to seek refuge in Grey Constantine's keep. Behind closed doors are secrets that can kill and both men give into an attraction that can bind them irrevocably.

Being a werewolf, Jeremy knows the moment he sees Grey, he has found his mate. Unfortunately, Grey is being driven to near insanity by his own brother and the loss of Grey's lover, Rhys.

Haunted by his own internal demons, Grey tries his hardest to believe in the promise Jeremy offers him. When Grey's brother tries to destroy them, they both must fight the forces threatening to tear them apart.