Der Fürst der Nacht

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.

Two young men serving at the front. One comes from a good family, the other's family is poor. But the sister of the middle-class son falls in love with his poor comrade when he returns home for Christmas.