Death Bell 2 (2010) Korean Movie

A class of students stays at school for a camp in an elite study group to finesse their and the school’s grades. Upon the first night, the swimming coach is found murdered. As the students try to figure out what happened, a voice informs them that if they don’t figure the murder out, students will begin dying in quick succession.

Native Title: 고사 두 번째 이야기: 교생실습
Also Known As: Gosa Du Beonjjae Iyagi: Gyosaengshilseup , Gosa Du Beonjjae Yiyagi: Gyosaengsilseop , Sino da Morte 2: Acampamento Sangrento