Investigating how a severed hand ends up on the third green of a Cumbrian golf course is not how Detective Inspector Avison Fluke has planned to spend his Saturday. So when a secret protection unit from London swoops in quoting national security, he's secretly pleased. But trouble is never far away. A young woman arrives at his lakeside cabin with a cryptic message: a code known to only a handful of people, and it forces Fluke back into the investigation he's only just been barred from. In a case that will change his life forever, Fluke immerses himself in a world of New Age travellers, corrupt cops and domestic extremists. Before long he's alienated his entire team, has been arrested under the Terrorism Act - and has made a pact with the devil himself. But a voice has called out to him from beyond the grave. And Fluke is only getting started....