[1] During a dinner given by a wealthy count (Fritz Kortner), his beautiful wife (Ruth Weyher) and four of her suitors come together at the 19th-century German manor.

The count challenges the man he perceives as his rival (Gustav von Wangenheim) to a duel.

[1] Siegfried Kracauer ranked it among the masterpieces of German cinema, but lamented that it came and went all but unnoticed by the general public.

[2] Director Arthur Robison was born in Chicago, Illinois in 1883, but grew up in Germany where he became an established writer-director in the German silent film industry.

Referred to in Brideshead Revisited by Evelyn Waugh is Anthony Blanche's description of Sebastian's companion Kurt: "He is like the footman in "Warning Shadows" - a great clod of a German..." (presumably the character portrayed by Fritz Rasp).