A western woman falls in love with a chinese prince. When she accompanies him to his homeland, strange things await her. Based on the operetta of the same name with music by Franz Lehár and libretto by Ludwig Herzer and Fritz Löhner-Beda.
Mary and Eva are best friends, although they couldn't be more different. Armand, Mary's fiancee, falls in love with the seductive Eva, who is busy becoming a revue star. When Eva fails and loses her money, Armand tries to help her out.