England, 1953. Renowned American parapsychologist Doctor Roy Earle, famous for discrediting hauntings and exposing fake mediums, is invited to attend a séance in Blaine Manor, said to be the most haunted building in England. However, Earle’s arrival awakes something horrific within the manor’s walls. As a raging storm closes them off from the outside world, Earle and his companions find that what is waiting within the manor is not nearly as horrific as what has entered with them.