White Christmas

A group of students from Soo-sin High School, an elite boarding school located in the remote mountains of Gangwon, decide to remain at school for the Christmas holidays. 

The tension builds with the discovery of a letter that has been sent to all students suggesting there is a murderer amongst them, followed closely by the arrival of psychiatrist Kim Yo-han (Kim Sang-kyung) seeking refuge after his car has broken down in the heavy snowfall.  Trapped in the mountains, with no hope of escape, everyone soon becomes a suspect as their deep, dark secrets from the past are slowly revealed.