Mindy takes in Angel, an energetic pony rumored to guide its owner to a stash of gold concealed in the surrounding mountains. When a deranged treasure seeker abducts Angel, Mindy and her classmates venture into the hills to save the pony and search for the elusive gold. Along the way, Mindy encounters a mountain dweller who cautions her that the treasure is linked to an old curse—removing the gold would mean the destruction of the enchanting forest.