Dr. Cheon and the Lost Talisman

Dr. Cheon and his assistant In-bae arrive at a wealthy household to perform their usual exorcism scam. Cheon shakes his bell, which never rings, while they stage a convincing ritual to secure payment and a golden toad statue. After the job, they return to the office to store ritual items and map the location for future jobs.

Back at the office, the pair stores their ritual items and marks the location on a map for later exploitation. The routine planning underscores their cynical approach to spiritual work. Their systematized process shows how they monetize fear.

Yoo-kyung offers fifty million won upfront to investigate her haunted hometown of Goecheon, pressing them to take the job. Although Cheon hesitates at first, the money convinces him to accept the assignment and pursue the promised payout.

The team arrives in Goecheon and finds a village cloaked in unnatural fog, full of funeral homes and an unnerving atmosphere. At Yoo-kyung's home, her terrified younger sister is locked away, seemingly possessed.

Cheon tries to reassure everyone by ringing the bell again, but this time it rings for the first time ever. The unexpected ring confirms a real spiritual presence haunting the house.

When the possessed sister confronts Cheon, the entity lashes out violently, breaking the bell and activating the broken half of the sacred Chilseonggeom sword. The sudden attack makes Cheon realize the threat is far more dangerous than the fake exorcism suggested.

Cheon uses the sword to destroy the ghost, and in the process shatters a bamboo spirit vessel belonging to the dark shaman Beom-cheon. Beom-cheon now understands that Yoo-kyung is a threat he must control or eliminate. Beom-cheon's followers report the incident and outline a plan to retrieve Yoo-kyung's spiritual eyes, which allow her to see reversed spells and spirits.

Cheon reflects on his past: he inherited spiritual talent from his grandfather, a shaman who once tried to save Cheon's missing younger brother using a talisman. Beom-cheon interrupted the ritual, causing the grandfather and the brother to die, which motivates Cheon to become a self-taught shaman.

Beom-cheon attempts to steal Yoo-kyung's eyes by possessing her, but Cheon intervenes, driving the spirit out and recovering another talisman from Yoo-kyung's sister's pillow. This near-miss deepens the peril they face.

Cheon seeks help from a divine shamaness to locate the other half of the Seolgyeong. With Yoo-kyung's spiritual sight, they identify reversed spell markings and burn a talisman tied to Beom-cheon.

The shamaness explains Beom-cheon has hunted powerful shamans to gain divine power and that Cheon's grandfather nearly sealed him once. She provides guidance toward Mount Yongwol where the remaining Seolgyeong is hidden.

Cheon and Yoo-kyung head toward Mount Yongwol, while Beom-cheon learns of their movement and lays a trap for them along the way. The pursuit heightens the tension as both sides press forward.

On Mount Yongwol, Cheon retrieves the remaining half of the Seolgyeong despite powerful illusions. With the sword fully restored, he prepares for the final confrontation against Beom-cheon.

Cheon battles Beom-cheon but is overpowered and loses the weapon. Reinforcements arrive to distract Beom-cheon, buying time for the sealing to proceed.

The sealing is completed when the Seolgyeong's chains trap Beom-cheon's soul and the sealing script is read in reverse, erasing his spirit for good. In-bae offers Yoo-kyung a spot on their team, and Cheon nods in approval.