Miss Lo leaves finishing school and returns to her parents’ hotel “Zum Weißen Schwan”. One of the chambermaids eloped with the bellboy and now the daughter has to help out – sometimes as a maid, sometimes in the guise of a bellboy. When she falls in love with Lieutenant Clairon, her male disguise begins to stand in her way. At a ball she has to to look on helplessly while he’s flirting with other women. But with the help of her friend Röschen, who’s the cousin of Clairon, a happy ending is attained.