So-Ah works as a teacher at a local school. She was curious about Boo Young-Suk, a student with a sinister aura who is always present on the attendance list but no one calls him by name. The more she tries to get Boo Young-Suk back to school, strange things begin to happen at school.

Horror

Kim So-hye, Jung Yoon-suk, Lee Gyu-hyeon, Yoo Na-gyeol, Karin, Yeonge