Due to bullying, Eun Bi decided to end her life but she was saved by her twin sister.
Lee Eun Bi lives in an orphanage whereas Go Eun Byeol, Eun Bi's twin sister lives with a woman who adopted her. Go Eun Byeol and Lee Eun Bi are identical twins. Kim So Hyun as Lee Eun Bi / Go Eun Byeol.