Life for Trixie has been dificult since her humiliation at Ponyville. However, during her employment in an antique shop, she accidently releases a mad but powerful magician from an old mirror. Taking advantage of his confusion, she decides to use him to help her get revenge on Twilight Sparkle.

After her stint in Ponyville, Trixie, down and defeated, wanders into a mysterious woods haunted by something that has driven ponies mad. It is something that is cruel, something that is merciless, something that is...evil.