Five girls have been murdered on the Isle of Man in the last eighteen months. When DI Harry Grimshaw is told he must work with a psychic investigator, he is hostile and sceptical, in spite of the fact that tattooed, foul-mouthed biker Dora Balniel is not a stereotypical clairvoyant. In spite of their animosity, they work together to sift through Celtic legend and magpie folklore to probe the mind of an obsessive serial killer known as The Daaney One. It becomes clear that Dora has been deliberately lured to the Isle of Man by the killer and that he has the ability to probe her mind. With the murderer controlling what Dora sees, Harry struggles to maintain control over the situation and keep Dora safe. As the sizzling attraction between them builds, it will require all of Harry’s ingenuity as well as her own psychic ability to ensure Dora is not the next victim.