On Christmas, high school student Bae Joonyoung discovered the dead body of his classmate Lee Sowoo buried under snow at school. Prior to his death, Sowoo had gotten into a fight with class bully Choi Woohyuk. Sowoo was sent to talk to Han Kyungmoon, the legal counsel for the school’s foundation, who wanted him to hide damaging information. Han Jihoon, Sowoo's questionably only friend, played the cello at Sowoo’s memorial service, and Go Seoyeon got an anonymous accusation claiming Sowo