A man is washed up on a deserted beach on the Hebridean Isle of Harris, barely alive. 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. A detective crosses rough Atlantic seas to a remote rock 20 miles west of the Outer Hebrides. With a sense of foreboding he steps ashore where three lighthouse keepers disappeared more than a century before - a mystery that remains unsolved. But now there is a new mystery - a man found bludgeoned to death on that same rock. A teenage girl lies in her Edinburgh bedroom, desperate to discover the truth about her father's death. Two years after the discovery of the pioneering scientist's suicide note, Karen Fleming still cannot accept that he would wilfully abandon her. 'Coffin Road' follows three perilous journeys towards one shocking truth - and the realisation that ignorance can kill us.