The young musician and composer Josef lives with Beethoven's music copyist in Grinzing. In the evenings, he plays for dances in the Prater, often his own melodies, although he doesn't make much effort to spread them, as they're almost all waltzes, a dance not well-regarded in high society because they're too sweaty. When one evening a lively princess—fresh from the convent—mingles incognito with the Prater crowd and falls in love with the dashing conductor Josef, an entire cultural system of values begins to crumble.
Hans Járay
as Josef Langer
Irén Ágay
as Prinzessin Marika
Maria Balcerkiewiczówna
as Gräfin Lubowska
Alexander Fischer-Marich
as Hofer, der Notenkopist
André Mattoni
as Prinz Georg
Phillis Fehr
as Liesl, Fürst Hohenaus Tochter
Hans Homma
as Fürst Franz von Hohenau
Anna Kallina
as Fürstin Agnes von Hohenau
Sylvia de Bettini
as Steffi
Eugen Neufeld
as Salieri
Camilla Spira
as Gast im Praterlokal
Teddy Bill
as
