The Earl of Selkirk and his family learn of the impending arrival of American pirate John Paul Jones, they flee their castle, leaving behind Nora, the kitchen maid. Left alone in the house, Nora dons the clothes of her mistress and parades herself about the castle until the arrival of the king's light infantry. Because they mistake her for the lady of the house, she invites them to be her guests. Meanwhile, on board the pirate ship, third officer Darby O'Donovan recognizes the little island as his former home. Sent ashore by the commanding officer to investigate, Darby sees Nora, his old sweetheart, seated at the table with the redcoats and, impersonating an Irish gentleman, he interrupts the gathering. Later, a fisherman exposes Darby's true identity and he is arrested. Nora, determined to save her lover, disguises herself as a soldier and signals the pirate ship for help. After a thrilling battle between the pirates and the soldiers, the pirates escape and Darby sails to America accompanied by Nora.—Pamela Short