Kim Yo Han is a psychiatrist who gets involved in a serial murder when his car broke down on Christmas Eve during a sudden storm and he is forced to take shelter at a private high school. Seven students and a teacher are also there over the winter break, but they are gradually murdered one by one as they receive letters from a killer who wants revenge for the death of his mother and sister.
김상경
as Kim Yo-han
백성현
as Park Mu-yeol
김영광
as Jo Young-jae
이수혁
as Yoon Soo
곽정욱
as Yang Kang-mo
홍종현
as Lee Jae-kyu
이솜
as Yoon Eun-sung
김우빈
as Kang Mi-reu
성준
as Choi Chi-hoon
정석원
as Yoon Jong-il
이엘
as Oh Jung-hye
Episode 1
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
