Hee-yeon moves to her hometown near Mt. Jang in hopes of finding her lost son. One day, she meets a girl in tatter which reminds her of Jun-suh. She then decides to bring her home, until she finds her parents. As the girl enters the house, strange things begin to happen to the family. The girl mimics Hee-yeon's daughter, Jun-hee, her voice, and look; eventually, calling Hee-yeon, mom. Will this family find happiness again?