Kang Yu Jin, a wealthy biology professor doing a butterfly field study, takes in a new housemaid; the young woman, Mi Ok, is the daughter of a shaman priestess who recently died in a house fire. At first, Yu Jin and his wife Seon Hee, welcome Mi Ok into their home, but Seon Hee begins to have misgivings when she sees a strange wooden doll that the maid has brought with her.Having suffered from nightmares about exactly the same doll, Seon Hee becomes increasingly suspicious and paranoid that Mi Ok is trying to terminate her and usurp her household. In a sudden fit of madness, Seon Hee causes Mi Ok to fall to her death. From then on, Seon Hee is tormented horribly by visions of the doll attacking her and it starts to take a great toll on her sanity. Is it actually happening or just all in the girl’s mind?