A man is washed up on a deserted beach on the Hebridean Isle of Harris, barely alive and borderline hypothermic. He has no idea who he is or how he got there. The only clue to his identity is a map tracing a track called the Coffin Road. He does not know where it will lead him, but filled with dread, fear and uncertainty he knows he must follow it. A detective crosses rough Atlantic seas to a r...