- HD 1080
- Runtime: 102m.
- Status: Released
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- Languages: zh
- Country: Philippines, Taiwan
- Director: John Hsu
- Stars: Gingle Wang, Hung Chang Chu, Chin-Yu Pan, Tseng Jing-hua, Li Kuan-yi
- keywords: high school, martial law, book club, betrayal, school, psychological thriller, teacher student relationship, based on video game, oppression
- Production_studio: 1 Production Film, Lots Home Entertainment, Filmagic Pictures, Gamania Digital Entertainment, Taipei Film Commission, Kaohsiung Film Fund, MandarinVision, Warner Bros. (F.E.)
- Slogan: Back to School...
- providers: OVID
- The Detention is featured in the top rankings of 2019
- #93 in Top Thriller Movies of 2019
- #46 in Top Mystery Movies of 2019
- #41 in Top Horror Movies of 2019
In the 1960s, two classmates go looking for their missing friends and teachers, all of whom took part in an illegal book club, only to come face to face with ghosts and deformed monsters that have taken over their school.
