A preacher is accused of adultery and he and his followers are chased out of town and become stranded in an isolated forest which is haunted by the spirits of long dead Native Americans.

In the wake of Hurricane Camille, the infamous '60's storm that crippled the Gulf Coast, a mysterious teenage girl washes up to shore, and the secrets of Mississippi's Sister Island crawl to the surface. Dorrie (Kathleen York), a young doctor living with her mother (Karen Black), assumes custody of the unknown girl (Erin Buchanan) and...