 The film tells the true story of a poor peasant woman in the 1600s who lived in an isolated cave in the Val di Non. Accused of witchcraft by the townspeople, the woman is taken to Palazzo Nero, where under torture she admits her guilt and implicates her accusers in revenge for their wickedness. Condemned to death, she refuses to repent, and for this reason is burnt at the stake in the town s square.