Sana Yi awakens in the body of Isana Castilla, chained inside a cell and moments away from being burned at the stake as a witch. Though she manages to make a quick escape, she falls right into the hands of the soon-to-be-emperor Ludwig, who decides to make her his empress for her magical powers. As it turns out, Sana is actually the “Witch of Pain.” But will she be able to live up to that name and bring agony to all those who threaten her life and Ludwig’s?