Based on actual events that took place at Gwangju Inhwa School for the hearing-impaired, where young deaf students were the victims of repeated sexual assaults by faculty members over a period of five years in the early 2000s.
Gong Yoo
Kang In-ho
Jung Yu-mi
Seo Yoo-jin
Kim Hyeon-soo
Kim Yeon-doo
Jung In-seo
Jin Yoo-ri
Baek Su-ho
Jeon Min-soo
Jang Kwang
Principal / Principal's Brother
Kim Joo-ryoung
Yoon Ja-ae
Kim Min-sang
Park Bo-hyeon
