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.

Yeo Ri finds out the Eight-feet Spirit devoured her grandmother's spirit while trying to save the late King. Cheol makes Bi Bi guard Yeo Ri in case she puts herself in danger while pursuing the Eight-feet Spirit. As the King wants to make Choi Won U the First Vice-Premier, Kim Bong In uses Pung San and Dowager Queen to put a stop to it.