Trixie's life was ruined by the Ursa Minor incident. In canon, she returned to town upon obtaining the Alicorn Amulet.
Here, however, Trixie heard about the Want-It-Need-It mass spell on Ponyville, about some troublemakers using a love poison, and a group of ponies playing as a dress-up hero to show up their friend. What if Trixie instead decided to get a more subtle form of revenge by a battle of words against Twilight Sparkle's friends?
Takes place during 'It's About Time' in Season 2.