A young boy emerges from a coma after a fall down an abandoned mine shaft. His family is confronted by dark, threatening spirits and the possibility that the child in their home might no longer be their son.
A former bar entertainer now lives a quiet life with her husband -- until he loses his job. To survive, she returns to the world of adult entertainment, entering a voyeuristic club where everything slowly begins to fall apart.
Kang Eun-kyung, who has come for her teaching practicum, encounters members of the Black Sky black magic club, who are ranked first in the national mock exams. She discovers that there is a witch behind the girls. To retrieve the souls that the witch has taken, she opens the door to the world of darkness.