Twelve-year-old Sadie Madison and her mother, Millie, and brother, Sammy, run away from her abusive father, Brad, and escape to an abandoned cabin in the Blue Ridge Mountains owned by Millie's grandmother. As the summer of 1968 comes to a close, Millie knows they can't spend the winter in the cabin, but they also can't risk letting Brad find them. Sadie will need to harness her magic power in order to save the family.