Antiques dealer Robert Manning goes to the village of Greymarsh seeking his missing brother, Peter. His search leads him to Craxton Lodge, a mansion owned by Morley, an enigmatic aristocrat. Manning is welcomed by Morley's niece, Eve, who invites him to stay the night. During a local festival celebrating witchcraft, Manning experiences strange hallucinations and nightmares involving a sinister woman and bizarre rituals. He suspects these visions are connected to his brother's disappearance.

As Manning investigates further, he becomes entangled with the legend of Lavinia Morley, an ancestor accused of sorcery and burnt at the stake. He discovers that Craxton Lodge has a dark history tied to witchcraft and occult practices. Manning's quest for the truth uncovers secrets within the village and hints at a lurking menace behind his brother’s fate. Each step closer to the truth heightens the eerie and perilous atmosphere surrounding the mansion and its inhabitants.