Though they are not related by blood, her adult stepbrother has always treated her gently and seemed to cherish her. The moment their parents leave on a trip and the two are alone, however, he reveals his true nature. Driven by a warped obsession, he locks her in a room and toys with her. She resists at first, but after being raped and brainwashed by her sadistic stepbrother, she finally succumbs to his twisted version of love.