Erin has always believed in magic, but she never believed she had powers of her own! Until one day Erin looks up into the clouds and sees a herd of magic horses! Erin discovers that she is a weather weaver with special powers, and the sky horses need her help. Mistral the young sky foal has been captured by a dark spirit and together with Tor, his father and king of the sky horses, it's up to Erin to rescue him. But a secret fear is holding Erin back from using her special powers - will she find the courage in time to save Mistral?