The great adventures of life and human connections in contemporary Korean society, following a formal baseball player, a sleepless student, a new hangman, an imprisoned gangster, and a mysterious father and daughter.
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.