There is a house where a family of four live: mother, her eldest daughter Young-hee who is married, younger daughter Kkot-nip who is in high school and Young-hee’s husband Sang-ho. The family is filled with happiness when Young-hee gives birth to a child, but an unfortunate mishap caused by mother leads to the death of the child. Totally distraught, Young-hee decides to leave her mother’s house with her husband. Mother’s Alzheimer’s condition worsens with the couple moving out and Kkot-nip is forced to live in anxiety. At school she is pushed around by schoolmate Jung-hye and at home she has to deal with her mother who has issues of controlling her emotions. With no one to help her, Kkot-nip is driven to the edge.