Yong-nyeo, who was sacrificed for love and had lost her life, is reincarnated as a snake and takes the form of a woman. She seduces Ji-eon, the son-in-law of Aristocrat Shin, a man of power. They fall deeply in love and spend the night together. Meanwhile, Shin, who had caused Yong-nyeo's death is haunted by strange accidents. Shin is eventually killed by Yong-nyeo. Yong-nyeo, with the karma of having killed, cannot stay in this world and leaves for the other together with her love Ji-eon.