The Horse Whisperer
It's about a girl, Grace, who goes riding in the snow with her friend. Her friend's horse started to slip and she fell off in the middle of the road. Grace tried to save her but it was too late, they all got hit by an 18-wheeler. Grace and her horse Pilgrim lived, but she lost half of her leg and her horse lost his mind.
Grace's mom calls the horse whisperer to come to New York to help Pilgrim but he said NO. So Grace and her mom drive all the way to Montana to see him instead. In Montana, Grace and Pilgrim begin the long road to recovery.