Cozy Glow's mother and father return from a long trip just before Twilight's coronation, and are understandably unhappy at being parents to a statue. Where have they been all this time, though? And how did their daughter turn out the way she did?
After a few months of consideration, Starlight comes to Twilight to request Cozy Glows release. Twilight agrees, although fear of how releasing one of Equestria's worst villainesses in the most turbulent of times causes her to hide the filly.
Princess Twilight Sparkle tasks Fluttershy, Discord, Spike and Flurry Heart with reforming an unexpectedly repentant Lord Tirek, who is holding a dark secret about his motives.
Tired of her boring life in the Crystal Empire, Flurry Heart is called to Ponyville. She quickly finds herself thrust into adventure as the townsfolk are threatened by a red, horned monster.
Twilight Sparkle has decided to look after Cozy Glow after her recent takeover attempt. Twilight now contemplates whether or not this was a good idea. Meanwhile she must come to terms with her promotion to be the Princess's successor.
Discord, Celestia, and Luna have lived in peace for years. But when Twilight's student-Luster Dawn -'reforms' Chrysalis, Tirek, and Cozy Glow, the chaos master and pony sisters end up involved just like the old days (as do many others). Chaos, ho!
These are the ordinary days in the extraordinary lives of Cozy Glow, Rumble, Flurry Heart and their friends as they learn, play and grow under Twilight's tutelage.
Cozy Glow was a Princess, and she has vowed to become one again. Flurry Heart is and alicorn and destined to become a Princess one day. Can they help one another grow, or are there some gaps that not even the magic of friendship can bridge?
After several years of a slow and steady relationship with Fluttershy, and the near victory of the Legion of Doom, Rainbow Dash decides that it's long overdue to take the next step in their relationship.
Twilight, pitying the fate that Cozy Glow suffered, decides to free her from the statue prison. But after she does that, she realizes that Cozy Glow is emotionally broken and she will have to play an important role in Cozy Glow's life.
In the distant future, where Twilight rules Equestria, Chrysalis still remains in her stone prison. Tiger Tornado, a student at the School of Friendship, brings her poems to Canterlot, returning to the dream girl she's never met.
Flurry Heart, seeking to find a reason behind Cozy Glow's actions in the past, ends up releasing her from her stone prison. But Cozy has other plans, and reformation is not one of them.