Beware what lies beneath ... One fateful, starry night, three friends embark on a secret camping trip, but only two return home. Thirty years later, the body of a teenage boy rises from the depths of England's biggest reservoir and threatens to expose a killer who has lain dormant ... until now. Detective Chief Inspector Ryan returns from honeymoon to face danger from all sides. In the depths of Kielder Forest, a murderer has escaped justice before...