Despite being the heir of a family that has safeguarded the village for generations, "Dr. Cheon" is a fake exorcist who doesn't believe in ghosts. Then comes "Yoo-kyung," a client who can see spirits, seeking his help. With an offer that's hard to refuse, Dr. Cheon delves into the events at Yoo-kyung's home and stumbles upon the secret of "Seolgyeong," a mystical talisman intertwined with his destiny. How will Dr. Cheon, a fake exorcist, confront a formidable case of possession like never before?