Five years passed since the case with serial killer Yi Byeongdo took place.
Hayeong, who turned 16 years old, has been trying to overcome her trauma. But even with the continued effort of psychological counselling, she still is passing a confusing time.
Pushed to be sensitive, by reaching adolescence and unexpected relocation, Hayeong gets stimulated by the violence taking place in her new school.
As her inner shadow grows, what choice will Hayeong make after facing it?