Former government assassin Cameron Winter thinks he's finally found peace--and love--with therapist Gwendolyn Lord. But when she tells him about a baffling "locked room" murder in Tulsa, Winter's instincts pull him back into the shadows. The deeper he investigates, the more dangerous the case becomes--linking two impossible murders, a ruthless billionaire, and a ghost from his past. As his old life collides with his new one, Winter must decide how far he's willing to go to protect the woman he loves.