The film stars Dorothy Dalton, Thurston Hall, Edward Cecil, Leota Lorraine, Otto Hoffman, and Charles K. French.

[3] As described in a film magazine,[4] a love affair between Paula Harris (Dalton) and Hugo Wagner (Hall), begun in Wilhemstrasse, continues in America where the two, as German spies, obtain employment in the home of Dorothy Robinson (Lorraine), fiance of Clement Boyd (Cecil), an inventor who perfected a rifle.

On their wedding day Clement and Dorothy are spirited away to the home of Professor Fredeerick Fischer, a cog in the German spy system.

A search of Clement fails to find the plans for the rifle, and Hugo and Paula, who conducted the abduction, are told that they bungled it and will have to answer to "his excellence".

The torture of Clement by "his excellence" is halted when Paula tears the mask from his face, exposing William Kremlin (French), a respected citizen.