Prince Yeonsan-gun attempts to sexually harass Yahwa, the wife of Yun Pil-u who was beheaded after being branded as a traitor. Yahwa commits a suicide following her husband but, before she dies, has already asked her cat to make revenge. Since that time, the bodies of the court ladies and the patrol guards are found every morning and ghosts of Pil-u and Yahwa regularly appear along with the mewing sound of the cat. Kim Chung-won, head of the guardsmen and also a former friend of Pil-u, borrows the supernatural power of a senior Buddhist priest and succeeds in getting rid of the ghosts for the peace of the nation.