The Countess Charming (1917)

"As a "woman" he finds everything coming his way. The old fellows all fall for "her"-the young ones, too. There's a robbery, "The Countess" becomes a man and the mystery deepens."

Stanley Jordan, a wealthy young bachelor, attends a Red Cross Benefit at the country club where he meets and falls in love with Betty Lovering and unwittingly offends Mrs. Vandergraft, the social leader.