The film tells the tragic fate of railroad guard Thiel at the end of the 19th century. Thiel, who spends his days in the dull, monotonous fulfillment of his duties, has lost his gentle, quiet wife Minna. He remarries out of concern for his young son Tobias. His second wife Lene, with whom he also has a child, is superior to him in vitality and has a rough passion. He discovers that his child from his first marriage is being discriminated against and tormented by her - Thiel withdraws more and more into himself and becomes lonely. When Tobias is killed in an accident, he blames Lene, and disaster is inevitable...