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.
It tells the story of a family who is brought together when their matriarch falls ill, only to find that their lineage is connected by more than blood.
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.