Original title (MS): Pengepungan di Bukit Duri (Siege at Thorn Hill)

Edwin (Morgan Oey) promised to his sister on her death bed to find her son she gave up long time ago. Edwin’s quest brought him to become a substitute teacher in Duri High School, Jakarta, a school for juvenile delinquents. There he must face the most violent students to find his nephew. When he eventually finds the boy, a city-wide riot erupts and Edwin is trapped im the school with the cruel kids out for his blood.

https://www.themoviedb.org/movie/1280089-pengepungan-di-bukit-duri