Mirror of the Witch is a historical fantasy drama that follows the tragic life of Princess Seo-ri, who is born as a cursed child due to her mother's desperate attempt to conceive using black magic. Abandoned and left to die in the mountains, she is saved by a Taoist master and grows up as a witch with the power to heal, though her touch brings death to those she loves. She lives in hiding, struggling to break the curse that binds her fate to the darkness. Her path crosses with Heo Jun, a brilliant but impoverished young man who dreams of rising above his status as an illegitimate son. As they join forces to uncover the truth behind the royal curse and confront the powerful shaman Choi Hyun-seo, they find themselves entangled in a dangerous web of political intrigue and supernatural forces. Together, they must navigate the treacherous royal court and fight to reclaim Seo-ri's humanity and rightful place in the world.