The Hole in the Ground movie plot

Single mother Sarahand son Chrisleave the city to start a new life in a small village, but mysterious neighbors make their lives more eerie. One night, the son disappeared mysteriously, and the mother couldn't find it and hurriedly called the police, but the son suddenly appeared "I'm not going anywhere". From that day on, the mother needed to rely on drugs to treat the disease, but found that the familiar son was gradually becoming stranger, as if being charmed by a ghost Control replaced and become a ghost stand-   in.