This has shades of the 1977 movie, "The Hills Have Eyes." https://www.imdb.com/title/tt0077681/trivia?ref_=tt_trv_trv
The movie is based on the legend of Sawney Beane and his family (a wife, eight sons and six daughters), a feral clan who inhabited and roamed the highlands of Scotland's East Lothian County, near Edinburgh, in the early 1400s. They captured, tormented and ate several transients. They were eventually captured on the order of Scotland's King James, were judged to be insane, and executed without trial. The executions of the Beane clan all allegedly involved grotesque tortures, inspiring the aspect of the film that the Carter family become as brutal as their attackers when they seek revenge.
https://www.historicmysteries.com/sawney-bean/
Medieval Ayrshire, Scotland was not the place to venture outdoors during the hours of darkness. For a quarter of a century, one group of inbred psychopaths struck fear throughout Ballantrae and Benname Head. Nobody knew where they came from but came they did and brought terror for the Scottish people of the time.
In a move of either outstanding ingenuity or complete lunacy, Alexander ‘Sawney’ Bean and his equally vicious spouse found a ready-made lair for the nefarious activities in a cave that was 200 meters deep and had an entrance concealed by high tide.
More at the link.