When tragedy strikes his family, young Mark is thrown upon the mercy of his enigmatic, prickly Aunt Fiona, who shares her home on an isolated island with a herd of enchanting, graceful wild ponies. For twenty years, the island has been Fiona's refuge from her own secret tragedy but she doesn't seem to have any mercy to spare, only rules. Mark is not to call her aunt. He must not tell lies. Most importantly of all, he is never to touch the wild horses. But when a hurricane leaves her a colt orphaned and doomed, Mark discovers that by breaking Fiona's rules, he inadvertently helps her and himself to begin their lives again.