The year 1917. Paris, once the glamorous city of light, is suffering amidst the chaos that is World War I. , Great Britain and Russia (the allies) are fighting against and the Austrian-Hungarian empire (the enemy). To heal the wounds of war, a beautiful dancer Mata Hari captivates all of Europe, her mysterious dance putting her at the centre of attention within high society. Mata Hari's status as a celebrity allows her to travel between the warring countries making her a valuable asset to the French army and one day a visit from George Ladoux of the French military intelligence changes her life forever. Meanwhile she begins a relationship with a young French pilot, Armand Gilot, but all is not as it seems....