When Men Desire (1919)

Robert Stedman (Fleming Ward), American diplomat attache, leaves Germany when war is declared, but his German sweetheart, Marie Lohe (Theda Bara), is detained by the covetous Major von Rohn (G. Raymond Nye), who, for over a year tries to force her to marry him. But, by luck, she is enabled to impersonate a German spy, and makes her way to the Switzerland border only to be caught and detained again by Major von Rohn. She gets word of her predicament to Stedman in Switzerland and he flies to her rescue.