Grim Morrigan, Guardian of the Ward and part-time private detective, polices the Folk, the clans of fairies who live in the foothills outside Denver. But his main job is concealing their true nature from the mortals around them.
Enter mortal Annie Duran, who hires him to look for her brother Richard, missing and presumed dead for ten years. Annie has seen Richard in the parking lot of the nightclub where she works. Now she wants answers, and Grim's supposed to find them.
The quest for Richard ensnares both Grim and Annie in a sinister conspiracy involving kidnapped women and outlaw magic. But they also discover their own overwhelming attraction to each other.
When Annie herself disappears, Grim's need for answers becomes even more urgent. With the help of a dissolute prince and a motley crew of unlikely fairies, Grim confronts a rebellion among the Folk.
And it may take more than just magic and luck to save both Annie and Grim this time.