It is the day of The Summer Sun Celebration. Not just any celebration either, but the one thousandth. Twilight Sparkle, the personal student to Princess Celestia, has been sent to Ponyville where it is being held to make certain everything has been set up and is ready. However, Twilight believes that something bad is about to happen. As the time for sunrise approaches, can Twilight figure out a way to avert disaster?