My Father's Happy Years (1977)

Original title: Apám néhány boldog éve

Director Sandor Simo based this film on his recollections of a period in his father's life just after World War II. In the film, Janos Torok is a chemist and an entrepreneur With enormous enthusiasm, he gets loans to purchase a small chemical plant and begins experiments to create innovative products, such as hormones. Meanwhile, the communist party has come to dominate Hungarian life in such a way that his activities are viewed as little more than criminal. He is hauled away to a prison camp, but even then his letters home are full of boundless optimism and his ideas for further experiments.