Deeply wounded by her embittered mother's lack of sympathy for her aspirations, Elnora finds comfort in the nearby Limberlost Swamp, whose beauty and rich abundance provide her with the means to better her life.
When a diphtheria epidemic hits her 1840 village, thirteen-year-old Jessie discovers it is actually a 1995 tourist site under unseen observation by heartless scientists, and it's up to Jessie to escape the village and save the lives of the dying children.