A filmed portrait of Professor Tadeusz Reichstein, discoverer of cortisone and holder of the patent for the production of vitamin C, a Nobel Prize laureate in Physiology or Medicine in 1950. Born in Włocławek at the end of the nineteenth century, Professor Reichstein lectures in Basel and holds Swiss citizenship. A man of remarkable modesty who avoids the media, he nevertheless makes an exception for Polish journalists. In the film, he speaks about his life and scientific career.