Karl Heinrich is the heir to the throne of the small European principality of Rutania, but he's a lonely child, not allowed to play with other children and knowing little about life outside the castle. When he reaches maturity, he is sent to attend the University of Heidelberg, and finds fellowshi with classmates and a blossoming love with Katie Ruder, his only friend during childhood and the niece of an innkeeper. However, political turmoil in Rutania forces him to return. War is declared. Heinrich returns to Heidelberg one last time to bid a somber farewell to his beloved Katie.
as Prince Karl Heinrich
as Katie Ruder
as Dr. Juttner
as Lutz
as Karl Bilz
as Von Wendell
as Kellerman
as Fritz Ruder - Katie's Father
as Frau Hans Ruder - Katie's Aunt
as Prince Rudolf (as Erik von Ritzau)
as Frau Fritz Ruder - Katie's Mother
as Prince Karl - Age 12
as Prince Karl - Age 5
