During World War I, Jane Whiting, a bright young lawyer who is engaged to Senator Wheeler, is assigned by the district attorney to expose a gang of spies who are collecting money for the German government through the operation of a fraudulent charity organization. Wheeler's son Frank has fallen in love with Lola Schram, whose pro-German mother is forcing the girl to work for Frederick Kube, the head of the spy ring, but when Kube learns of the romance, he orders Mrs. Schram to break it off. When Lola finally confesses her activities to Frank, Kube kills her and then frames Frank for the murder. Meanwhile, Jane, through the help of Jimmy and Tilly Ware, has discovered Kube's headquarters and modus operandi