The story follows a teenage girl who, after being rejected by every secondary school she applies to due to her poor grades, enrolls in a newly opened school that promises to accept students of all abilities as discovered in advertisements online. But upon arriving, she discovers the school is far from ordinary. Its abandoned appearance, eerie atmosphere, and strict rules soon reveal a terrifying truth: no student is ever allowed to leave. Trapped alongside a handful of other students under the watch of a mysterious teacher, they must work together to escape the haunted school before they become its next permanent residents.