What happens when Cho Sa-Rang a ordinary high schooler in her prestigious school of International Seoul School hits her head after slipping down the stairs. She waks up to see the HATE VAULE how much much a person hates another. But why does the famous Go Do-Yoon have an intense hate toward her boyfriend of one week ,Song Seung -Il, like a curious little cat she is she tries getting deeper into things, but sometimes things you don't know are dangerous. Will she ever be able to understand whats wrong and whats going on. But why is Go Do-Yoon looking at her like that now. What secrets is Go Do-Yoon hiding?