

Just outside Gare de Lyon, Ruth is found in her compartment strangled to death with a bashed in face. Ruth's gigolo, her husband, her husband's discarded mistress are also on the train. In a moment of blue funk, Ruth befriends Katherine and unburdens herself. Lady Ruth is carrying the Former Tsarina's rubies and many people are very aware of that fact. Lady Ruth Kettering (an American Heiress) is about to divorce her husband (at the behest of her father) and meet her gigolo of a lover in Nice, she too is aboard the Blue Train. Mary Mead (No Marple) and is bound for Nice on The Blue Train to visit her money hungry cousin.

Katherine Grey, the enigmatic young woman of the memorable eyes, has left her post of caregiver (the old woman died leaving Katherine well off) in St.
