During World War I, young Frenchwoman Francine D'Espard meets U.S. Army officer William Holliday at the front, and they become engaged. Returning to America, William finds his father at the mercy of his business rival, Ezekiel Bates. Shortly after, when Francine arrives in America to marry her fiancé, she is informed that her lover is about to marry Bates' daughter Susan. Her love now turning to hate, Francine devotes herself to the task of destroying her former suitor. Through her connections with the U.S. Secret Service, the two are involved in many adventures, and just as Francine is about to avenge herself, she discovers that Holliday has been true to her the whole time. Upon finding evidence that Bates, in addition to being the cause of all their troubles, has also defrauded the government, Francine has him arrested and finally reunites with her lover.