Captain Frank Marvin and Lieut. Bob Chase are army draftsmen in the Ordnance Department. Marvin is working on plans for a submarine that is expected to revolutionize warfare. One of the foreign governments is anxious to obtain the plans.
as Capt. Frank Marvin
as Zena, Valpar’s Niece
as Ruth Chase
as Lt. Bob Chase
as Molne Valpar
as Monte
