The Crucible (도가니) is a 2009 novel by Gong Ji-Young (공지영) a well known South Korean novelist, based on an actual case of mass sexual abuse at a school for the deaf in Gwangju Inhwa, South Korea. The title was taken from Arthur Miller's eponymous play.
Kang In-ho is a teacher forced to leave his family after the suicide of a former student he had been romantically involved with. He settles in Mujin (a fictional city) where he finds employment as a teacher at a school for the hearing impaired.
On the first day of his new job, a young boy is struck and killed by a train, the latest of a series of accidents he soon discovers. He hears of a young girl who had recently committed suicide by jumping off a cliff.
Kang soon suspects things are not as they seem and discovers that the students, (both boys and girls) are being abused by the principal (a powerful and highly respected member of the community), an administrative head and a dormitory superintendent.