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Though the Soviet Union's own hands were hardly clean in the matter of religious persecution, Russian filmmakers of the late 1930s wasted little time condemning the vicious anti-Semitism of Hitler's Germany. Professor Mamlock tells the story of a brilliant Berlin surgeon who is literally "intolerated" to death. While performing a delicate operation, Mamlock (S. Mezhinski) is driven out of the hospital by Gestapo goons because he is a Jew. Having failed in his efforts to secure another job, Mamlock attempts suicide. While recovering in a hospital room, he hears the sounds of a Storm Trooper rally outside his window. Unable to stand any more, he delivers an impassioned speech against his Nazi tormentors and is promptly murdered for his troubles. Soon, however, there arises a strong and very vocal anti-Nazi resistance movement, spearheaded by Professor Mamlock's courageous son Rolf (O. Zhakov).