Set in the blooming 1960s, the film centres on two young brothers who are instantly robbed of their lives when they are placed in a boy's home forgotten by time. Armed only with a vivid imagination and a fickle hope, the boys engage in the frightening battle against Headmaster Heck and his lethal tyranny. The film is based on actual events.

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.