When Mercedes Thompson’s friend Zee calls her for a favor and Mercy takes a trip to the reservation with him to investigate a string of murdered fey. The fey plan to keep it to themselves until a human ends up dead and Zee is arrested for the murder. When no one sides with Zee to find the true culprit Mercy decides to continue the investigation herself. It turns out that artifact have gone missing and leads Mercy on an undercover mission. When a fey suspect follows her home he runs right into the pact. Even with the fey fighting her every step of the way Mercy is determined to get Zee out of jail.