시골의 유곡 초등학교, 서울 학생들과 정유미 선생님(최지나)이 교환수업을 받으러 온다. 서울 학생들은 유곡 초등학교 김개동 선생님(신동엽)이 들려준 귀신이야기에 겁을 먹고 정유미 선생님은 화장실에서 귀신을 보게 된다. 호기심이 발동한 아이들은 귀신을 찾으러 돌아다니고 유곡 초등학교 학생 만득이의 경고에도 불구하고 출입금지 구역인 별관으로 향한다. 그곳에서 아이들은 온갖 귀신들에 쫓겨 실종되고 주동자인 태석은 아이들을 찾기위해 만득이를 찾아가는데...

Jung Yoo-mi and her students come to Yoo-gok Elementary School in a rural town as a part of an exchange program. They are spooked by a campus ghost story told by Kim Gye-dong, a teacher at the school. But the students' curiosities get the better of them and they decide to search every nook and cranny for the ghost. Unfortunately, it is Yoo-mi who runs into the ghost when she goes to the bathroom at midnight. The campus ghost story now becomes real to everyone at the school. The fearless threesome, Tae-suk, Chul-soo and Hoon, decide to go to the annex building where the ghost is believed to reside in. But Man-duk warns them vehemently against going there. When Tae-suk receives a message that the school is cursed, he and his friends sneak into the annex building to uncover the mystery once and for all. His friends are chased by the ghosts and now Tae-suk must find his missing friends.