Die, Monster, Die! (1965)

Stephen Reinhart travels to a remote English village to visit his girlfriend Susan Whitley. From the moment he arrives in the village, it's clear that no one will speak of the Whitleys or even give him directions to the Whitley estate. Susan is happy to see him when he finally makes it there but her father Nahum tells him he must leave immediately. Susan and her bedridden mother Letitia are happy to have him stay but it's clear that Nahum Whitley has a secret, one that Susan isn't aware of, but is kept in the cellar of the house.—garykmcd