Rainbow dash fears nothing, well almost nothing. So what happens when Twilight gets an interesting letter in the mail that will make Rainbow face her fears.
When one banishes her sister for a thousand years, holidays can become shockingly lonely. Celestia devises a plan to bring her and her banished sister just a little bit closer.
When twilight sees a falling ball of fire during one of her stargazing excursions she concludes that it is something more sinister than a simple meteor.