Teenage jealousy rears its ugly head in this horror tale. The students at a boarding school test the legend of a 28-step staircase located in a girls' dorm: If each step is counted aloud, the staircase will reveal a 29th step, and a wish is granted. But when one student dies mysteriously and others begin acting possessed, it becomes clear that the staircase is being used for evil. Ji-hyo Song, Han-byeol Park and An Jo star.