Fresh from maternity leave, Detective Elma finds herself confronted with a complex case, when a man is found murdered in a holiday cottage in the depths of the Icelandic countryside - the victim of a frenzied knife attack, with a shocking message scrawled on the wall above him.

At home with their baby daughter, Sævar is finding it hard to let go of work, until the chance discovery in a discarded box provides him with a distraction. Could the diary of a young boy, detailing the events of a long-ago summer have a bearing on Elma's case?

Once again, the team at West Iceland CID have to contend with local secrets in the small town of Akranes, where someone has a vested interest in preventing the truth from coming to light. And Sævar has secrets of his own that threaten to destroy his and Elma's newfound happiness.