Han Gong Ju is forced to transfer school and is taken to a home in an unfamiliar area. The home belongs to her former high school teacher's mother. The mother wants to know why her son is leaving Han Gong Ju there, even if he promises she will be there for only a week. Gong Ju carry a secret she doesn't want to be exposed in her new home. ~~ Based on the real events of "Milyang junior high school" case.