A respectable married woman, college professor Bella has a strange encounter with a beautiful girl on the train and falls under her spell. Entranced by the girl's dark Latin looks and daring, Bella soon discovers that the girl is one of her students. But can she resist her provocative advances?
In a series of sensual and taboo-breaking encounters, Bella surrenders progressively to her burning desire for this amazing girl. But is there also a more disturbing side to the girl's character? A series of disturbing messages lead inexorably to a heart-thumping climax that brings Bella to the edge of death...