Alison Lohman stars as Katy McLaughlin, a headstrong 16-year-old who lives with her family on a modern, working ranch. She's the only daughter in a long line of ranchers, and she'd prefer to be on the ranch instead of away at boarding school most of the year. Her dad, Rob (
Tim McGraw), is grooming her brother, Howard (Ryan Kwanten), to take over the ranch, but he'd rather go to college. Rob wants Katy to go to college, while her mom (
Maria Bello) sees Katy's independent spirit for what it is. Home from school, Katy catches a wild mustang and names it Flicka, decides the filly is her chance to prove that she's responsible, and begs her dad to let her tame it. But he sees nothing but trouble from the untamed animal, and is busy trying to save the ranch. He doesn't see that Katy and Flicka (and he himself!) are very much alike, shunning authority and not about to give up their freedom without a fight. Going against her father's wishes, Katy sets out to break through to Flicka and transform her into a riding horse. In the process, the horse manages to bring the family back together.