A woman leaves Boston to become the mail order bride of a cowboy rancher, doctor, and horse farm owner in Arizona. She's expected to take charge immediately, but barely knows which end of a horse is which. At first sight of the doctor's prize black stallion, she realizes that she most definitely has taken on far more than she can handle. However, the doctor is away tending to a family that needs his help desperately and she is the only one who can, perhaps, get the fiery horse to where they need him to be.