In May 1937, the citizens of Paris are horrified by the murder of a young woman on the Métro. The case is a classic locked room mystery, with an added twist. The locked room is a first-class car on an underground train. To Inspector Moreux of the Judicial Police, Laetitia Toureaux’s murder has all the hallmarks of a professional hit. But as he investigates the mystery of her death, he finds he must first solve the riddle of her life. Just who was Laetitia Toureaux and why did she have to die?  A Noiser production, written by Roger Morris.  For ad-free listening, exclusive content, and early access to new episodes, join Noiser+. Now available for Apple and Android users. Click the Noiser+ banner on Apple or go to noiser.com/subscriptions to get started with a 7-day free trial. Learn more about your ad choices. Visit podcastchoices.com/adchoices