When a demonic uprising threatens to end the world as they know it, a monk and an excommunicated priest join forces to protect a powerful young boy and the next generation of magic. As dark forces close in, the unlikely trio must confront their inner demons.

Following the Haedong Mystic Sect incident, Father Park, Hyun-am, and Joon-hoo team up to investigate a series of mysterious deaths of gangs. Seung-hee, haunted by dreams that mirror each death, turns to Father Park for help, while the victims are revealed to be those responsible for her twin sister Joo-hee's death, and each murder eerily matches a scene from a painting by their father, Hyun-woong. As the final portrait nears completion, the exorcists must uncover the dark force behind the paintings before it claims its next victim.