In a remote 19th-century Cornish village, an evil presence lurks within the darkness of the witching hour. A mysterious plague relentlessly consumes lives at an unstoppable rate. Unable to find the cause, Dr. Peter Tompson enlists the help of his mentor, Sir James Forbes. Desperate to find an antidote, they instead find inexplicable horror: empty coffins with the diseased corpses missing! Following a series of strange and frightening clues, they discover a deserted mine where they discover a world of black magic and a doomed legion of flesh-eating slaves … the walking dead!