Sang-won moves to a new house with his daughter Yi-Na in an attempt to mend their relationship, which has become awkward ever since his wife died in an accident. He perseveres even though it is not easy. He then notices that she is becoming more cheerful. She tells him she has a new friend now. However, as he starts to hear weird sounds coming from the closet in her room and realises that she is also acting stranger, he begins to be plagued by bizarre dreams. One day, she goes missing in the house. He searches frantically for her until a mysterious man approaches him and tells him to look for her in the closet.