Death Bell

"Death Bell" (2008), also known as "Gosa" (고사), is a South Korean horror-thriller film directed by Chang, starring Lee Beom-soo, Nam Gyu-ri, and Yoon Jeong-hee. The film is set in an elite high school known for its academic excellence and follows a group of students who become trapped inside the school and are forced to solve complex riddles to survive a series of deadly tasks orchestrated by a mysterious killer. **Plot**:The story begins with the top students of an elite high school being held captive during a test-preparation session. They are locked inside the school and are subjected to a series of twisted challenges by a sadistic voice over the intercom. The challenges involve solving difficult puzzles and answering questions, with each wrong answer resulting in the death of one of their classmates. As the students struggle to survive, uncovering dark secrets and facing moral dilemmas, they must race against time to unravel the identity of the killer before they all meet their doo