When three ponies go to the Almighty Author of Life to audition for the next villain roles, they find he has declared a new rule: All villains from now on must have sad backstories of being rejected and reformations.
In the last election, Amethyst Star accomplished what was once thought impossible by becoming the first unicorn mayor. Things have changed since then and despite the good economy, her chances of being re-elected are not guaranteed.
Pinkie Pie and Cheese Sandwich are having a party off in order to decide just who is the best party pony in Equestria. A competition that Maud Pie chooses to join.
When Flim unexpectedly shows up at Apple Acres seeking advice from Applejack, she turns him away due to previous experiences but another mare steps in to help him in his time of need.
"I've thrown some pretty super parties in my time, but this one must be off the charts, cause two of my besties are finally trying to hook up! Wait, four of them are! Ohmygosh, they're all trying to hook up! ...Maybe this isn't the best party ever."
Starlight has come of age and is now going to aid Celestia with bigger issues. What she doesn't know is that things will not only change for her, but her friends as well.