With Twilight now on the throne as Ruler of Equestria, the royal sisters have retired to the small island community of Silver Shoals. However, their long awaited retirement isn't going quite as smoothly as they might have hoped. It seems that when ruling a nation for over a millennia, one might not think too much about the work that goes into living a normal life.

Celestia writes one final letter to her student, Twilight Sparkle, with one very important message. Celestia is dying, and Twilight will be the one to take her place.