In a small, secluded school, a cryptic video leads a teacher and her students on a chilling journey into the past, where the line between the living and the dead blurs....

In a small town in Lanzhou, a viral video of a teacher's secret classroom experiment sends shockwaves through the community, unraveling a web of supernatural phenomena and dark family secrets....

When a mysterious teacher vanishes from Liuzhou No.35 Schoolhouse, students and staff uncover a haunting secret that intertwines with the teacher's past and their own....