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In a prologue, as a woman pages through a book, male figures, including a musketeer, a cowboy, a swordsman and a military officer, appear and bow. In the main story, the visit of Prince Ferdinandi sends New York society women scurrying to purchase gowns for the upcoming ball. The woman seen earlier looking longingly at the book, Marjorie Bowen, a model, fights off the advances of Cadwallader Smith, who accompanies a patron. When handsome Sir Derwain Leeds, the prince's aide-de-camp, arrives to see his fiancée, Yvette Fernau, outfitted, Marjorie exchanges a shy smile with him. After Derwain leaves, Marjorie overhears Yvette and Cadwallader plot to obtain proof of the prince's affair with a married woman. The next evening, Marjorie is mistaken for Yvette and abducted to lure the pursuing Derwain to a deserted house. There she convinces Derwain that Yvette is a conspirator. At the ball, Marjorie, posing as Yvette, obtains an incriminating letter about the prince's liaison. After Marjorie struggles with Yvette, and hides the letter in her silk hose, Derwain reveals that he is really a U.S. Secret Service man and kisses her. Later, Marjorie is not sure whether she dreamed her adventure or not.