Dr. Cheon and the Lost Talisman by Kim Seong-sik

6.19

For generations, the eldest son of the village has been the protector, but the current heir, Dr. Cheon, is a fake exorcist who doesn't believe in ghosts. Using his penetrating insight into people's minds, he performs fake exorcisms and resolves cases brought to him. However, Yoo-kyung, a client who can see ghosts, approaches him with an offer too tempting to refuse. With his assistant In-bae, Dr. Cheon heads to Yoo-kyung's house, and gets involved in a series of strange phenomena. As they delve into the mysteries there, they uncover the secrets of a talisman known as 'Seolkyung'...