Ohio, 1926: For many years, the railroad track in Moonvale Tunnel has been used as a shortcut through the Appalachian hills. When an elderly woman is killed walking along the tracks, the brakeman tells tales of seeing a ghostly female figure dressed all in white. Newly elected Sheriff Lily Ross is called on to the case to dispel the myths. With the help of her friends Marvena Whitcomb and Hildy Cooper, Lily follows the woman's trail to The Hollows, a notorious asylum, and they begin to expose dark secrets long-hidden by time and the mountains.