When an internet vigilante develops a revolutionary new computer program to combat online predators, its rapid advancement leads to serious questions of autonomy, oppression, and what it really means to be human.
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
