Nine-year-old Tory has been bumped from foster home to foster home. Living with a foster family on a horse ranch for the summer, she falls in love with Lucky, the shaggy pony she is allowed to ride. When a nearby forest fire forces the family to evacuate, Tory is devastated when Lucky has to be left behind. The story alternates between the points of view of Lucky and Tory. Lucky flees from the fire into the wilderness, where he searches for water...