Cain Killion knows himself to be a damaged man, his only saving grace the extrasensory connection to blood that he uses to catch murderers. His latest case takes a macabre turn when he discovers a familiar and haunting symbol linking the crime to his own horrific past-and only one woman could know what it means. Mercy Ledger is brave, resilient, beautiful-and in terrible danger. The moment he sees Mercy, Cain knows he's the one who can save her. He also knows he's beyond redemption. But the lines between good and evil blur and the only thing clear to Cain and Mercy is that they belong together. Love is the antidote for blood-but is their bond strong enough to overcome the evil that stalks them?