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.

• Sangeori Pictures
• Fantagio
• Gong Yoo
• Jung Yu-mi
• Kim Hyeon-soo
• Jung In-seo
• Baek Su-ho
• Jang Kwang
• Kim Joo-ryoung
• Kim Min-sang