It is 1936, and Nancy Wake is an intrepid Australian expat living in Paris when she meets the wealthy French industrialist Henri Fiocca. When the Germans invade France, she becomes Lucienne Carlier, who smuggles people and documents across the border. Nancy earns a new nickname from the Gestapo for her remarkable ability to evade capture: the White Mouse. With a five million franc bounty on her head, Nancy is forced to escape France and leave Henri behind. When she enters training with the Special Operations Executives in Britain, she is told to use the name Hélène with her comrades. And finally, with mission in hand, Nancy is airdropped back into France as the deadly Madam Andrée, where she claims her place as one of the most powerful leaders in the French Resistance.