In 1923, an American named Delapore, the last descendant of the De la Poer family, moves to his ancestral estate in England following the death of his only son during World War I. To the dismay of nearby residents, he restores the estate, called Exham Priory. After moving in, Delapore and his cat frequently hear the sounds of rats scurrying behind the walls. Upon investigating further, and through...