Sunset Shimmer still has a lot of guilt to sort through for her past actions with the help of Princess Celestia and some unorthodox methods that might leave Sunset unable to sit for a while.
In a failing attempt to prove her sister wrong, Celestia is determined to make Luna understand that the sun is not made of custard. This would be easier if Luna wasn't already keen on the idea that the moon is made of cheese as well.
After Celestia humiliates her at a dinner, Luna storms off and ends up snooping around in her sister's room. There, she stumbles upon the journal Celestia kept immediately after the banishment of Nightmare Moon.
Luna has finally come back from her banishment on the moon and reconciles with her sister. After being separated for a millennium, they both rediscover how important family is.
From the first day they'd met, Silver Spoon and Diamond Tiara were best friends. On the day Diamond Tiara stood up to her mother, things proved to be no different.
With the help of her friends in Ponyville, the Tantabus was subdued...but what about Celestia? What about Luna's closest friend, a pony who had no idea what was going on in her little sister's mind?
We all know what happened on the longest day of the thousandth year. But what about before then? What truly happened a thousand years ago? This is Celestia's story, of the day she lost her sister, Princess Luna, to a dark spirit named Nightmare