After the tragic death of his wife, architect Sang-Won moves into a new home with his daughter, Ina, hopeful to restore their relationship. Ina feels increasingly neglected by her busy father, so she starts withdraws more and turns to strange noises from within her closet for comfort. While searching for her, Sang-Won meets the enigmatic Kyung-Hoon who claims to know Ina's whereabouts and leads him to open the mysterious closet.