Twilight Sparkle continues to write letters to Princess Celestia & Princess Luna after becoming a princess herself, but this time as a friend rather than a student.
After a portal malfunction threatens to seal the human world and Equestria apart, the Rainbooms decide to write letters of friendship and appreciation to Princess Twilight.
Time after time, Twilight Sparkle tried to find out the reasons for Cozy Glow's actions and got rejected. But maybe a special team of ponies and creatures could succeed where she and her friends have failed. She was not going to give up so easily.
Little sister, I confess. I released Nightmare Moon. I released Discord. I brought the Changelings to Canterlot and I brought the Crystal Empire and King Sombra back. All this I did for Equestria. All this I did to save Equestria.
Sunset Shimmer has been defeated at the Fall Formal, but something has gone drastically wrong and Principal Celestia must play magic detective to rescue Sunset from the fallout.
It's been three years, but us three Crusaders are finally comin' home. I've been lookin' forward to this forever, so why'm I feelin' like my stomach's all aflutter?