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.
Kang In-ho
Seo Yoo-jin
Kim Yeon-doo
Jin Yoo-ri
Jeon Min-soo
Principal / Principal's Brother
Yoon Ja-ae
Park Bo-hyeon
Young-hoon
Attorney Hwang
Prosecutor
Judge
Police Officer Jang
Principal's Wife
In-ho's Mother
Sol-yi
Young-soo
Auto Repair Shop Owner
Professor Kim Jung-woo
Hostess 2
Courtroom Sign Language Interpreter
School Custodian
Broadcasting Station PD
Publishing Company Employee
Court Attendant 1
