Overview

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.

Top Cast

Sung Joon

Choi Chi-hoon

Kim Sang-kyung

Kim Yo-han

Lee Soo-hyuk

Yoon Soo

Baek Sung-hyun

Park Mu-yeol

Kim Young-kwang

Jo Young-jae

Kwak Jung-wook

Yang Kang-mo

Hong Jong-hyun

Lee Jae-kyu

Esom

Yoon Eun-sung

Kim Woo-bin

Kang Mi-reu

Jung Suk-won

Yoon Jong-il

Lee El

Oh Jung-hye