Romance of an absent minded designer of planes and a famous singer to whom he tries to sell his friends' songs.

During the Austro Hungarian empire, a girl substitutes for her brother in a military academy.

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.