Following the murder of a wealthy patriarch, Poirot is called upon to begin an investigation. The case takes a wild twist, however when his prime suspect turns up dead.
Mystery surrounds a young woman after her new husband is killed in the London Blitz, but with the discovery of new information, Poirot wonders about her true motives.
When the daughter of an oil magnate is found dead on the famous Blue Train to the French Riviera, Poirot must investigate the past to reveal the killer.