The letter that effects everything...

About a girl named Ashley going to a boarding just for riding. Her horse Watson is a quarter/ warm blood.
Ashley knows that the school has a reputation to be the hardest when it comes to school work.
Ashley shows her skills in the ring and the other girls claws come out. They are used to being the best and the brightest on the team, and they will risk anything to get Ashley out of the way.
Will Ashley survive the first semester? Or will she move and never come back?