Engrossed in the perfection of a new high power explosive, the husband seems to neglect his wife. She is further piqued by the introduction into their home of a man whose presence is unexplained, but who is really a Secret Service operative guarding the invention.
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.
In order to help her poverty-stricken family, Jonnie Consadine, a strong-willed young woman from the Blue Ridge Mountains, comes to the city and takes a job in a mill, while her uncle, Pros Passmore, continues his endless search for a lost silver mine.