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.
