Dr. Wagner is a scientist currently working on an experiment for the Asta plant in East Berlin. If the experiment is successful its a brilliant new invention. But Wagner is the target of sabotage, and all the decisive experiment fails. Wagner can not explain this setback.
Professor Mauthner, after many years of exile (having emigrated in 1933 to the USA), returns to Germany in 1948. He can in fact return to his teaching post, but the rejection and petty intrigues of his reactionary colleagues and students make his work almost unbearable.