When Billy, a troubled young man, comes to private eye Cormoran Strike’s office to ask for his help investigating a crime he thinks he witnessed as a child, Strike is left deeply unsettled. While Billy is obviously mentally distressed, and cannot remember many concrete details, there is something sincere about him and his story.

The world's most beloved detective, Hercule Poirot--the legendary star of Agatha Christie's Murder on the Orient Express and most recently The Monogram Murders and Closed Casket--returns in a stylish, diabolically clever mystery set in the London of 1930. Hercule Poirot returns home after an agreeable luncheon to find an angry woman waiting to berate him outside his front door.