Warlock Moon (1973)

Young lovers John and Jenny decide to go for a drive in the countryside one day when they happen upon the remains of a longabandoned resort spa After doing some exploring they find that an elderly woman Agnes Abercrombie is living in the crumbling building As they learn the gruesome history of the place involving cannibalism and a ghost bride Jenny becomes the victim of violent attacks and supernatural visions But no one will believe her and now shes stuck in the dilapidated resort overnight Will she survive until morning