In the Joseon Dynasty, Cho Yeon must accumulate 100 years of yin energy to become a shaman. On her wandering training path, she encounters a bachelor ghost who died a virgin and unexpectedly finds herself in a dangerous situation. In a desperate moment with no way out, Cho Yeon gives him a shocking offer—“If you help me accumulate yin energy, I will allow you to have the sexual intercourse you desire.” On the edge of taboo and desire, the two gradually become closer, exorcising ghosts and fulfilling each other’s desires.