The story takes place on the Isle of Harris in Scotland's Outer Hebrides. The setting is central to the story. The characters react to the flora and fauna of the scenery and the stormy weather patterns are part of the plot. Since the author is a Scotsman he is an expert on the geography of this location.
The main character washes ashore on a beach on the Isle of Harris with amnesia. He has no idea who he is or why he is on the island. He learns a few things about himself from other characters, including where he is living and eventually his name, but begins a search into his identity after finding a map of the island that leads to a path called Coffin Road. He feels led to this part of the island and begins his search there.
A rebellious teenager Karen Fleming stops attending school after her mother decides to let her boyfriend move in. She feels her mother is betraying her father who has been dead for 2 years and determines to find out more about him.
Homicide detective George Gunn travels to a remote island to investigate the death of a man in an abandoned lighthouse where a century earlier 3 lighthouse keepers disappeared.
The stories of these 3 characters merge together in a tightly woven plot. There is a lot of suspense in this book which turned out to be an eco-thriller. I was not expecting the story to go there but it added an interesting aspect to the plot. An amazing read. Highly recommended!