Attacked, brutalized and then stalked, Casey Montgomery has to confront the man everyone else says doesn't even exist. Is he a figment of post-trauma stress, an over active imagination or a real and present danger? If she doesn't find him, her career will be ruined and her sanity questioned. But, that's the least of her worries. If she's right, he will have to kill her to preserve a carefully designed illusion that has her colleagues and even the police fooled. Only one person in the world believes her, a tough cop who has learned to trust his instincts, in spite of the evidence. But will that be enough to trap the invisible man with a sadistic taste for revenge?