It's been three thousand years since the fall of Azzaziel and the rebirth of evil; three thousand years since the Sentinal Order, an elite group of warrior angels, returned to Celestium. Their job-rid Earth of the dark creatures, the UnHoly. And with luck, end Azza's rule. As if casting out demons isn't hard enough, five-hundred-year-old Nesy has to masquerade as a teenage girl to do it. Nesy is the best of the Sentinals. She never makes mistakes, never hesitates, never gets emotionally involved. Until she meets Aydan. He is evil incarnate; a fallen angel that feeds off the souls of others. Everything Nesy is supposed to hate. But she can't, because he's also the love of her former life as a human girl-a life that ended too soon, tying her to emotions she was never supposed to feel. Now Nesy must choose between doing her duty-damning Aydan to the fiery depths of hell-or saving him, and condemning herself. And her choice may cost her, and Celestium, far more than anyone realizes. How much will she sacrifice for love?