In the misty hills of Pendle Forest, Lancashire, in 1612, fear and superstition grip the local villages. The story follows the Device family—Elizabeth Southerns, known as Old Demdike, a woman rumored to have practiced dark magic for decades, and her impoverished descendants who survive by begging and alleged witchcraft. When a peddler falls ill after crossing young Alizon Device, suspicion ignites into accusation. Magistrate Roger Nowell investigates, and old family rivalries, grudges, and confessions spiral into one of England's most notorious witch trials. As arrests multiply, the accused face betrayal, imprisonment, and the gallows at Lancaster Castle, where justice and hysteria become indistinguishable.