Der Gelbe Schein

Der Gelbe Schien English titles The Yellow Ticket and The Devils Pawn is a 1918 German silent film starring Pola Negri in a double role as Lea and her mother Lydia, Victor Janson as Ossip Storki, and Harry Liedtke as Dimitri. It was directed by Victor Janson and Eugen Ills.

Dimitri goes to their professor, Peter Zukowski, to tell him of Leas double life. Prof. Zukowski then ruminates over his own double life, having fathered an illegitimate childyears prior with a fellow student named Lydia. He does not know what became of either Lydia or the child. Meanwhile, Leas former tutor Storki learns that his deceased sister has allegedly received a gold medal for her studies at the University in St. Petersburg. Storki is suspicious and asks for a leave of absence from his work to investigate the matter. A meeting between Stroki and Prof. Zukowski reveals that Lea is actually the professors long lost daughter. The next day, Lea is brought to the University for an emergency operation. The professor learns on the spot this it is Lea, his daughter, that he has to save from death. The surgery is successful, and Lea recovers, with both her father and her admirer Dimitri at her side.According to the restored version of the films intertitles, The Yellow Ticket takes place in Warsaw in 1918, during the First World War before the German army had left. In the film, Warsaw was used to portray the city of St. Petersburg. Many scenes were filmed in the Jewish ghetto of Warsaw. It was a fulllength remake of Czarna Ksiazeczka, a 1915 Polish film directed by Alexander Hertz that also starred Negri. ........

Source: Wikipedia