Kelville-by-the-Sea, an outwardly quiet seaside town on the northeast coast of Scotland, has hired a new senior police officer, Helen Griffen. Hardened by a career spent policing in the city of Edinburgh, Helen looks forward to a peaceful last posting before retirement. But within her first few weeks on the job, Helen discovers that she's inherited a police sergeant who lives in the police station under an assumed name; a seven-year-old...