The year 1917. Paris, once the glamorous city of light, is suffering amidst the chaos that is World War I. France, Great Britain and Russia (the allies) are fighting against Germany 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....