There were those who thought the rare and beautiful wild stallion was just a myth. But for Hannah Mills and C.J. Adams the myth would become as real as the wild mountain range the wraith stallion called home. Hannah and her father Frank arrive at Mustang Matty Steadman's Bear Mountain Ranch, a spread which runs parallel to the Utah Nevada border. Hannah has come west to photograph the famous wild horses found on Matty's ranch. C.J. is from the neighboring ranch. Although C.J. is put off by Matty's request to watch Hannah, she reluctantly agrees to show her around. The girls become instant friends and they discover that the wild horses are disappearing from the range at an alarming rate. Novak is a wealthy, mysterious stranger, who appears to be the instigator of a sinister plot to steal all the mountain mustangs. While taking photographs of the wild herd one afternoon, the two girls happen upon the mysterious 'Wild Stallion.' The girls rush home to tell Matty and her ranch hands, Dallas and Ty Brody, about their discovery. Matty cautions all of them not to tell anyone about the black stallion because unscrupulous mustangers would want the rare stallion and would stop at nothing to get him.