Emma (Sophie Vavasseur), a teenage girl, quarreled with her parents over trivial matters and then cut her palm with glass shards. After that, the relationship between parents and children was loosened, but a new crisis has quietly unfolded. Emma would do some strange behavior, which made her parents extremely worried, so they had to leave Emma at home for education. During this period, they tried to take their daughter to see a psychologist with hypnosis skills, but the doctor eventually died suddenly in Emma's lap. Emma felt that she had been possessed by the devil, so she ignored the opposition of her parents who advocated science and insisted on seeking help from her uncle Keith (Doug Bradley), who was dismissed from the priesthood for failing to exorcise the devil. Keith seemed to gradually confirm Emma's guess, and the evil power in her body became stronger and stronger...