After running into trouble, teenager Mika's parents cancel her summer camp plans and cast her off to the countryside to live with her strict grandmother. In her grandmother's horse stables, Mika encounters the wild stallion Windstorm, a horse no one has been able to tame. Against all warning, Mika reaches out to Windstorm and ignites a powerful friendship that leads her to her true passion and the ability to tame even the wildest of beasts.