Joon is arrested for the murder of the top student at his prestigious school. When he is released, Joon holds students accusing him of the crime in a room and forces them to reveal their dark secrets.
Yoo-jin Taylor
Kim Joon
Park
Jeong Soo-jin
Han Myeong-ho
Kang Mi-ra
Choi Bo-ram
Detective Choi
Park Jeong-jae
Teacher Kim
Joon's mother
Myeong-ho's mother
Jeong-jae's mother
Kang Chang-min
Principal
Soo-jin's mother
