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Jin-seong (Song Ji-hyo) is a boarding school student and aspiring ballerina who desperately wants to get into a world-renowned arts academy. To improve her chances, she takes advantage of a local school legend: If a student walks up the dormitory staircase and counts all 28 steps, a 29th step will appear -- and a spirit will grant her a wish. But, when her friend suffers a horrible accident, Jin-seong realizes too late that she doesn't have control over how her wishes get fulfilled. Wikipedia