Actors: Song Ji-hyo, Park Han-byul, Jo An, Park Ji-yeon, Gong Sang-a, Lee Mi-yeon, Moon Jeong-hee, ...
Duration: 100 min
A staircase leading to the dormitory of a remote boarding school usually has 28 stairs, but every so often there appears to be 29. When someone steps on the mysterious extra stair, the horror begins.
