The landslide that occurred on the shore of the lake exposed a mass grave: the remains of adults and children with traces of violent death. Maybe this is the same community that settled in the local wilderness forty years ago and then mysteriously disappeared? A woman who was studying the history of the region and one day became interested in the missing settlement was found shot to death in her car. Is this really suicide? Private detective Charlie Parker was asked to check the version, but he is reluctant to take up the case - as if he had a presentiment that a fight with a very insidious and cruel enemy awaits him.