Mata Hari, agent H21

Dutch woman Margaretha Geertruida Zelle, better known during World War I as Mata Hari, is both an exotic Javanese dancer and a mysterious German spy. One night, after a performance, Mata Hari learns that her next assignment is to attend a society party, where she will meet French Captain François Lasalle. He will be carrying an attaché case containing classified secret documents. She is to seduce Lasalle and lure him back to her apartment, so that the vital documents can be stolen.