A group of old university friends leave the bright lights of London and travel to Unst, Shetland's most northerly island, to celebrate the marriage of one of their friends to a Shetlander. But late on the night of the wedding party, one of them, Eleanor, disappears - apparently into thin air. It's mid-summer, a time of light nights and unexpected mists. The following day, Eleanor's friend Polly receives an email. It appears to be a suicide note, saying she'll never be found alive. And then Eleanor's body is discovered, lying in a small loch close to the cliff edge.
Detectives Jimmy Perez and Willow Reeves are dispatched to Unst to investigate. Before she went missing, Eleanor claimed to have seen the ghost of a local child who drowned in the 1920s. Her interest in the ghost had seemed unhealthy - obsessive, even - to her friends: an indication of a troubled mind. But Jimmy and Willow are convinced that there is more to Eleanor's death than they first thought.
Is there a secret that lies behind the myth? One so shocking that someone would kill - many years later - to protect?
Ann Cleeves is the author behind ITV's Vera and BBC One's Shetland.
She has written over twenty-five novels, and is the creator of detectives Vera Stanhope and Jimmy Perez - characters loved both on screen and in print. Her books have now sold over 1 million copies worldwide.
In 2006 Ann was awarded the Duncan Lawrie Dagger (CWA Gold Dagger) for Best Crime Novel, for Raven Black, the first book in her Shetland series. In 2012 she was inducted into the CWA Crime Thriller Awards Hall of Fame. Ann lives in North Tyneside.