A BBC Radio 4 Full-Cast Dramatization starring Maurice Denham as the great Belgian detective, Hercule Poirot. Cast includes Anthony Smee and Judy Buxton. A millionaire strikes a deal on the seedier side of Paris and gives to his heartsick daughter, Ruth Kettering, the Heart of Fire, one of the worlds legendary jewels that once adorned the crown of the Tsars. Legend has it that the possession of the jewel leads to death, but despite her fathers protests, attractive young Ruth decides to take it with her when she boards the luxurious Blue Train to the French Riviera, where she has planned a reunion with her former lover. But the legend proves true and a few days into the journey, Ruth is found dead and her priceless rubies stolen. The suspects line up could the murderer be Derek, her weak and greedy husband Ruths former lover, the Comte de la Roche, who has a wellknown weakness for ladies and expensive gems or the beautiful but tempestuous dancer, Mirelle, Dereks scheming and expensive mistress? Only master sleuth Hercule Poirot can unravel the mystery and find the truth.