Coming-of-age story about a teenage girl's relationship with a wild horse. Katy Mc Laughlin (Alison Lohman) is a headstrong 16-year-old, eager to show her father that she is mature enough to manage the family ranch one day. In an attempt to prove her capabilties, she befriends & attempts to tame a wild mustang. An earlier film adaptation of Mary O' Hara's classic children's novel was made in 1943 starring Roddy Mc Dowall.