Inspired by her favourite books, and keen to settle once and for all who's the fastest, bravest, overall best pony around here, Rainbow Dash challenges Applejack to a race full of perils and pitfalls. To the winner, the title of Most Awesome Pony. To the loser, defeat, shame and ignominity. But when the dangers start getting a little too real, they have to decide what's more important. Victory, or friendship.