After being appointed as the vice-principal of her alma mater, Eun-hee becomes plagued by hallucinations. Branded a troublemaker by the teachers, Ha-young hears strange sounds coming from the school's dilapidated restroom.
Eun-hee
Ha-young
So-yeon
Young Eun-hee
Mi-sook
Jae-yeon
Ye-ji
Park Yeon-mook
Bae Kwang-mo
Grandmother
Classmate
Kim Jung-yeon
Seok Gong-nyeo
Choi Ji-hee
Kim Hong-ran
Nam Sang-taek
Police
Investigator Nam
High School Student
