Francis, a young man, recalls in his memory the horrible experiences he and his fiancée Jane recently went through. It is the annual fair in Holstenwall. Francis and his friend Alan visit The Cabinet of Dr. Caligari, an exhibit where the mysterious doctor shows the somnambulist Cesare, and awakens him for some moments from his death-like sleep. When Alan asks Cesare about his future, Cesare answers that he will die before dawn. The next morning Alan is found dead. Francis suspects Cesare of being the murderer, and starts spying on him and Dr. Caligari.

As a young couple stops and rests in a small village inn, the man is abducted by Death and is sequestered behind a huge doorless, windowless wall. The woman finds a mystic entrance and is met by Death, who tells her three separate stories set in exotic locales, all involving circumstances similar to hers. In each story, a woman, trying to save her lover from his ultimate tragic fate, fails. The young lady realizes the meaning of the tales and takes the only step she can to reunite herself with her lover.

Hans Baerlach is a Swiss police detective who has dedicated much of his career to pursuing powerful and allegedly murderous businessman Richard Gastmann. Though Baerlach’s partner meets his demise while investigating Gastmann, his replacement, Walter Tschanz, is undaunted. Meanwhile, the lovely Anna Crawley becomes involved in the case, which proceeds to take many twists and turns.