Oka and her husband move into a city apartment, dreaming of building a new life and someday raising a child there. Unfortunately, the neighboring unit is a sex den occupied by vile adult college students who repeatedly commit rape-like assaults. When Oka visits to deliver a neighborhood notice, they pose as respectable students, target her for her beauty, and sweet-talk her inside. From that day on, she is repeatedly gang-raped and treated as their sex toy.