At the outbreak of World War I, American Ruth Sherwood is stranded in the Belgian village of Beaupre. After Olga Karnovitch, a Russian spy eager to leave because of the advancing Germans, steals Ruth's passport, Ruth is taken into custody by the Germans. Among them she recognizes Eugene, formerly a head waiter in New York, who intercedes on Ruth's behalf, saving her from a death sentence. Later, when Wilfred Ferrers, a fellow American staying at Ruth's hotel, is sentenced to death because the Germans believe him to be a Russian spy, Ruth intervenes by attesting that he is her fiancé. The sentimental German general then orders the burgomaster to marry the pair immediately. Soon after, Ruth's fiancé Jack Martin arrives and reproaches Ruth for her actions. His insensitivity forces Ruth to realize that her love for Martin has died. As Ferrers and Ruth make a thrilling escape from the occupied village, both discover that they really love each other.