Wilderness in the Bieszczady mountains, with the nearest shop eight kilometers away. These are the conditions in which Zbyszek who burns charcoal decided to live. He treats hard work as a kind of atonement for his past deeds. Three tar makers who worked with him, including his son, are already dead. The man sees a link between their deaths and his deeds. His next companion is black Gustaw whose dream is to study medicine. Will he turn out to be the title fourth man?