Robert "Bob" Wesley horrifies his father, Admiral John Wesley of the Naval Advisory Board, by failing his examination at the Annapolis naval academy. Bob seizes the chance to redeem himself, however, when he overhears Hanson, the butler, plotting with German agent Count Von Ornstorff to deliver his father's plans for the Atlantic coastal defenses to German Baroness Von Hulda. In Baltimore, Bob meets the baroness' ship and, with the aid of an old college professor, makes her his prisoner. Having impersonated a woman in the college play, Bob disguises himself as the baroness, rendezvous with the spies, and obtains the plans.
Jack Mulhall
as Robert Wesley
Donna Drew
as Phyllis Covington
Wadsworth Harris
as Adm. John Wesley
George Gebhardt
as Hanson (as George Gebhart)
Jean Hersholt
as Count Von Ornstorff
Claire Du Brey
as Baroness Von Hulda
Maude Emory
as Margaret Wesley