In a separate universe, Sunset Shimmer and Twilight Sparkle were born into the world as alicorn princesses, twin daughters of Empress Celestia. One day, they were sent away to Ponyville, where they were destined to meet 5 special ponies.

The weird, megalomaniac long-lost aunt comes to visit

Celestia tells her daughters a story about Nightmare Moon

Current student of the Princess of Friendship, Sunset Shimmer, returns to Equestria for a visit. Twilight Sparkle and her other student, Starlight Glimmer, helps to show her how much better things can get when you learn to let go of the past.