An assassin is at work-one of the best in the trade. His body turned to dust long ago, but his spirit roams the Earth freely, undetectable to the five senses. He stalks his victims waiting for just the right opportunity. Then, in quick succession, he possesses a human host and strikes down his quarry. For a century and a half he has served this way.Deputy Sheriff Nate Barrington is riding the crest of a new relationship. Kaitlyn Spencer is beautiful, altruistic, enlightened-everything he's not. She teaches classes in New Age philosophy at her growing school. Nate doesn't share her spirituality, but the physical passion hasn't subsided enough for him to care.Nate's nirvana quickly unravels when Kaitlyn's life is threatened on two separate occasions. With no apparent motive or any evidence suggesting collusion, the police are stumped. Even more troubling to Nate, Kaitlyn is eventually convinced she is the target of unseen forces.A hardheaded pragmatist, Nate isn't prone to believe that spirits can possess people. As far as he's concerned, Kaitlyn's claims of perpetrators possessed by a spirit assassin are on par with comic book stories and have nothing to do with reality, and her esoteric, New Age mumbo jumbo begins to drive a wedge into their relationship. And why Kaitlyn? What secret is she hiding?Even with the sheriff's resources at Nate's disposal, the odds for Kaitlyn's survival are not in her favor. The true enemy is virtually invisible, and Nate's conventional police tactics have no effect on the spirit world. Strikes come from anytime, anywhere, and from random, unwittingly manipulated people. With their relationship buckling under the strain, they must pull together and join an unlikely ally if Kaitlyn is to remain alive.