The competitive and athletic Rainbow Blitz finds an unusual competitor that challenges him to a race: Indigo Zap. He takes the challenge from the athletic Shadowbolt, but there's a little more to that...
Since the creation of the Elements themselves, the bearers of Harmony have never found true happiness. After seeing so many generations of unfulfilled ponies, Princess Celestia decides to do something about it.
She's finally found a stallion that is everything she's ever wanted! He understands her competitiveness, needs for speed, and her hatred of boredom. There's just one problem. He could destroy the world.