It's just a game that's taken the entire world by storm. But it isn't. For the girls, the game of Duel Monsters has become the catalyst to an all new stage of conflict.
Lost her magic. Kicked out by Aria and Adagio. Going it alone. Not a good week for Sonata Dusk. Lucky for her, a certain someone decides to give her a second chance.
Twilight has just moved into Ponyville, a utopia-like city. One night, she receives a package from her sister. Inside, was the way the Alicorn Celestia reached her. She is destined to protect the world, an Element of Harmony.