Psychologist James Cobb gives a talk on the art of recovering lost memories, and is approached after by a dying man who, 40 years ago, woke up in a hotel room with a murdered woman and no memory of what happened. Now he needs to know whether he was an innocent bystander - or a killer. As his interest becomes an obsession, he begins to suspect that someone has buried the truth deep enough to hide it forever. For fans of Joel Dicker, Peter Swanson and SJ Watson.