Six young men and one girl are trapped within the attic of a frenzied young woman who only wants to be loved by those who will only devote themselves to her. As the girl unwillingly watches the six men become a part of a gruesome experiment, she learns what it means to be with others, and about her own strength.

Park So Jin, an average twenty-four year old woman, is in for a surprise when a tortured young man breaks into her house. The man is Lee Hongbin, a once normal man turned psychotic by a crazed ex-girlfriend. Will So Jin be able to help Hongbin regain his sanity, and take revenge on the woman who broke him in the first place? And can she manage to keep a hold of her own sanity in the process?