Prior to the declaration of World War I, dancer Varda Deering was a member of the Austrian secret service, but later became a loyal citizen of the United States. In America, she captivates many men but cares for none of them until she meets Lieutenant John Long. At first, he regards Varda as little more than a social butterfly, but gradually comes to recognize her goodness and falls in love with her. While John is away on a war-related diplomatic mission, Varda agrees to aid the U.S. Secret Service in procuring classified documents from August Von Grossman, an agent whom she had known in Austria.