Cheol asks Monk Ga Seop if he could perform gubyeongsisik and drive the Eight-feet spirit out of the world. The monk tells him that they need to deplete the energy of the glowing pearl within his body to settle the resentment of the evil spirit. After Prince Yeong In's passing, Cheol finds out someone in the Palace is aiding the Eight-feet spirit.

The water spirit attacks Yeo Ri with a deadly spell. She slowly shows the same symptoms as the Queen, who is bedridden due to an unknown illness. Kang Cheol suggests that the King become bait to catch the water spirit, as it wants the royal blood. Yeo Ri hears the news and rushes to the river where Kang Cheol and the King are waiting for the water spirit to emerge.