Starting a new school is never easy, especially when it’s one plagued by rumours of violent murders and vengeful spirits. Unfortunately for Hee-Min Lee, it takes less than two days before Yeondu High School’s newest student finds himself trapped inside the building overnight – and thrown face-to-face with the malevolent spirits roaming the corridors.
It started off innocently enough: Hee-Min had intended to quickly sneak in and out to hide some candies in the locker of a classmate. But as soon as he stepped foot inside the shutters slammed closed for the night, locking him inside with possessed janitors hellbent on killing intruders, and vengeful ghosts eager to sap his lifeforce away.
Can Hee-Min sneak though the school and discover a way out? Or is he fated to become yet another ghost haunting the classrooms of Yeondu High School?