A foal, born in the aftermath of a great storm, and her famous mother help raise money to repair the storm damage on Chincoteague Island and restore the herds of wild ponies on Assateague Island.
Paul and his sister Maureen's determination to own a pony from the herd on Chincoteague Island, Virginia, is greatly increased when the Phantom and her colt are among the ponies rounded up for the yearly auction.