Detective Sergeant Chris Waters got the call at 05.29 that July morning. This is it, said DCI Reeve, you'll be first there, it's all yours, you're the crime scene manager. Suddenly, after months of waiting and wondering, Waters finds himself in at the deep end, and alone at the scene of a puzzling murder. As the investigation proceeds, the detectives at Kings Lake Central find themselves visiting familiar places and talking to some familiar faces, while old enmities reappear in the incident room. Before this is over, Chris Waters will need to make a career-changing decision.

Umiko Wada has had enough excitement in life. With an overbearing mother and her husband recently murdered, she just wants to keep her head down. As a secretary to a private detective, her life is pleasantly filled with coffee runs and paperwork. That is, until her boss takes on a new case. A case that is surrounded by shadows. A case that means Wada will have to leave Tokyo and travel to London.

Harry Barnett, a middle-aged failure, leads a shabby existence. He is reduced to caretaking a friend's villa on the island of Rhodes and working in a bar to earn his keep. Then a guest at the villa - a young woman he had instantly warmed to - disappears on a mountain peak. Under suspicion of her murder, Harry becomes obsessed by the mystery that has changed his life and begins to trace back the movements and encounters that led to the moment where she vanished into the blue.

Ryan Wilkins grew up on a trailer park, a member of what many people would call the criminal classes. As a young Detective Inspector, he's lost none of his disgust with privileged elites - or his objectionable manners. But he notices things; they stick to his eyes. His professional partner, DI Ray Wilkins, of affluent Nigerian London heritage, is an impeccably groomed, smooth-talking graduate of Balliol College, Oxford. You wouldn't think they would get on. They don't. But when a young woman is found strangled at Barnabas Hall, they're forced to.

Why should distinguished Edwardian Cabinet minister Edwin Straford resign at the height of his career? Why does the woman he loves so suddenly reject him? Why, 70 years later, should people go to such lengths to prevent the truth coming out?