There was a series of murders in the city, and one person was killed every ten days. The murderer put the body in a suitcase and abandoned it in the wilderness. The girl at No. 202 Jiangshan apartment was the first victim. One day there was a sudden torrential rain after school, and the girl took a ride home in her neighbor's car. Unexpectedly, the neighbor abused and killed the little girl. The girl's stepmother (Jin Yunzhen) feels very guilty about this and often hallucinates that the girl comes home. In order to cover up the facts of his crime, the murderer did not spare anyone who had doubts about him, and the incident turned into a serial homicide. At this time, what frightened the killer most was the appearance of another girl who looked very similar to the girl who had been killed before. while planning to kill her, the killer fell into a demon. The movie "neighbor" is an adaptation of South Korea's popular online comic book writer Jiang Fu's online cartoon of the same name.