In November 1923, in a Berlin where a pack of cigarettes costs four million marks, most people have lost faith in the present and the future. Unemployed American acrobat Abel Rosenberg loses his brother Max, who has just committed suicide after feeling depressed for a period. Seeing the modifications in the behavior of people, but without clearly understanding the reasons, alcoholic Abel moves into the room of his former sister-in-law Manuela Rosenberg, who works in a cabaret at night and in a whorehouse in the morning. Together, they move to a small apartment near the clinic of their old acquaintance, Professor Hans Vergerus, who gives Abel a job in his clinic. While working in this strange place, Abel discloses the evil truth behind the research of Prof. Vergerus.—Claudio Carvalho, Rio de Janeiro, Brazil