A couple relocate from London to the wild mountain country of the Lake District. They are certain they want this change of life though his mother tells them it's too far, too remote, too uncivilised.
Their city ways (French wine and persimmons) are strange to the only local inhabitant (free range hens that feed on the midden) and they ask her the meaning of their house name: Elva House.
City folk shouldn't poke their noses into country ways. We only have to read folk-horror anthologies to know what. But clearly these two were not horror fans or they wouldn't have done what they did.