Change is afoot at Kings Lake Central police station. A most unexpected new detective inspector takes up his post this Monday morning, and the oldest detective in the place takes a momentous decision. Around them, other officers are considering their own situations, and even the building itself seems to be facing an uncertain future. But life and death go on, nevertheless, and by lunchtime someone will make a grim discovery on the Norfolk saltmarshes. A stranger seems to have suffered a slow and agonising death out there. As the team from Kings Lake uncover his story, they reveal another, much older one with its origins far back in the previous century. In the tide that governs the affairs of men, it seems, love and loss, betrayal and revenge are timeless themes. Readers of Colin Dexter, P D James and Ruth Rendell have all found much to enjoy in DC Smith's previous investigations.