While investigating the murder of a former detective, DI Frank Miller begins to see the connection between this and the murder of the head of Edinburgh's Serious Crime unit.As the investigation unfolds, a 25 year-old murder case is re-opened, and when Miller delves into the past, he finds that somebody had a secret that is costing people their lives.He also discovers the awful truth of who really killed his wife in a hit-and-run two years ago, and how his wife's killer is coming after him...