Detention
返校 (original)
Set during the Taiwanese martial law of the 1960s, this shockingly gruesome and terrifying coming-of-age drama based on a hugely popular video game sees two classmates who 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.
Starring Gingle Wang, Jing-Hua Tseng, Fu Mengbo, Cecilia Choi, Hung Chang Chu, Hsia Ching-ting, Pen-yu Chang, Yun Chung-Yueh, Chin-Yu Pan, Pan Chin-Yu
It's a mystery and horror movie, and has a rating of 6.6 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Finland.