''The Wild Stallion'' is about an 11-year-old girl from Cleveland, Ohio named Hanna Mills (Miranda Cosgrove), who wants to photograph wild horses for a project and to try to help save them. After visiting a ranch during summer vacation and befriending another 11-year-old girl named CJ (Danielle Chuchran), the girl learns about illegal activities that might jeopardize the Mustang (horse)s. Along the way she learns about the horses including the legend of the black stallion.