In the isolated town of Thorn River, a sinister pact with an ancient deity looms over its dark legacy. When Phoebe Sheppard arrives to settle an estate, she unwittingly enters a realm of supernatural horrors and becomes marked for sacrifice. Local Harrison Gray, aware of the town's terrifying history, races against time to save her, while anthropologist Dr. Antoinette Ryder uncovers the truth behind the legend, only to find herself drawn into the web of the town cult. As their fates entwine, they must confront the chilling secrets of Thorn River before it's too late.