When a local writer begins to investigate Oakamoors mysterious chained Oak, the chance find of a seventeenth century journal detailing the reasons for the Oaks chaining throws a new and terrifying light on the popular legend. Accounts of human sacrifice, witchcraft and warnings of a curse placed on the village by a woman named Mabel Othan litter the tattered pages. An enthusiastic and experienced team is hastily formed and begin to investigate the journals outlandish claims. However, as they begin to dig deeper into the myth and folklore that surrounds the Oak, a series of chilling events lead the team to believe that maybe the horrifying claims of witchcraft and human sacrifice made by the journal hold an element of truth after all.