Mrs. Aylwood is a distraught mom since her daughter, Karen, vanished within the English countryside over 20 years in the past. When the Carstairs household transfer into the Aylwood manor for the summer season, unusual occurrences start to unnerve the household and Jan begins to suspect that they're linked to Karen's disappearance. As Jan unravels the darkish previous hidden by the townspeople, she delves additional into the thriller and deeper into hazard, however now it could be too late to flee the Watcher within the Woods.