"The mystery of Evie Cormac's background has followed her into adulthood. As a child, she was discovered hiding in a secret room where a man had been tortured to death. Many of her captors and abusers escaped justice, unseen but not forgotten. Now, on a hot summer's day, the past drags Evie back as she watches the bodies of seventeen migrants wash up on a Lincolnshire beach. There is only one survivor, a teenage boy, who tells police their small boat...