The threat from above casts a dark shadow.
A man falls to his death from a cliff face in western Scotland. From a distance, another man watches. He approaches the body, tucks a book into the dead man's pocket, and leaves.
When the Scottish police show visiting Detective Chief Inspector Domenic Jejeune the book, he recognizes it as a call for help. But he also knows that answering that call could destroy the life he and his girlfriend...