Plot
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.
Cast
Kim Sang-kyung
as Kim Yo-han
Baek Sung-hyun
as Park Mu-yeol
Kim Young-kwang
as Jo Young-jae
Lee Soo-hyuk
as Yoon Soo
Kwak Jung-wook
as Yang Kang-mo
Hong Jong-hyun
as Lee Jae-kyu
Esom
as Yoon Eun-sung
Kim Woo-bin
as Kang Mi-reu
Sung Joon
as Choi Chi-hoon
Jung Suk-won
as Yoon Jong-il