Teenager Grace MacLean (Scarlett Johansson) is riding her horse and is hit by a truck. To help heal her troubled and injured daughter, and horse, the mother, Annie MacLean (Dame Kristin Scott Thomas), takes them to Montana to recuperate at the ranch of Tom Booker (Robert Redford), a "horse whisperer", a horse healer of mystical talents. Annie proceeds to fall in love with him, as well.