Six year old Rachel Vandermere didn’t believe in monsters—until she saw one kill her parents. Now all grown up and an INTERPOL investigator, Rachel has quietly amassed an impressive collection of evidence to support the existence of preternatural creatures. But she dares not go public with her beliefs until she can produce a living, breathing abnormal being to show the world—which she is certain she can do if only she can convince the enigmatic Nathan Cross to help her. Disavowed from the Chicago congregation of Gargoyles, Nathan has given up life as a guardian of mankind for a quieter, more human existence. But when Rachel shows up at his door spouting her crazy theories about monsters, he is thrust into the role of protector once again. For Rachel’s theories aren’t as crazy as some people might think, and her diligent pursuit of the truth might just get them both killed if the wrong people find out what she knows. With an ancient evil force gathering on the horizon to destroy them, Rachel and Nathan must both come to terms with the secrets of their pasts before it’s too late for them to save their future together.