After the mutilated body of a 3rd victim is found in the Cheshire town of Durton, Detective Chief Inspector Emily Sanders and her Department of Special Investigations is brought in to take over the case. As the investigation progresses, Emily and her team discover Durton's historical and current practice of witchcraft, and face the continuing brutality of the murders - murders that come far too close to home.
Who is the killer, and who or what is the voice driving him on? What are the missing body parts needed for? Is the local witchcraft all for show and tourism, or is there a darker, more genuine, side to it? And, if so, what is its connection to the murders?