Neulparan University (The school in Attack of the Pin-up Boys) is a prestige institution to which the smart and elite students study. It has gained bountiful achievements and recognitions and is known as the best university in South Korea.

But despite of all those, rumors began to circulate, phenomenon started to show up, students shout in horror and crying in pain, and worse, stories and secrets begin to unfold as time goes by. And what’s surprising is that fantasy is starting to become real, little by little, at the time to when the Halloween Festival is about to begin.

What are those stories? And will the histories and mysteries be unfolded easily? And what will happen to all the students?