One day, all seniors in BigHit School has been commanded to run their final semester examination in BigHit's old school. All senior students has been told that BigHit's old school has been abandoned about over 20 years so the students don't go wander around the school carelessly due to some destructive place that could leard harms to students. It is a rumour that there is a student that found missing in BigHit's old school before they close it for 20 years. After 3 days students runs their ex