Discord is back,and it's Derpy's fault.Although she didn't mean to,now Equestria has been plunged into chaos once more.Derpy can't do anything to solve the problem since she can't use any of the Elements of Harmony.Not only that,Discord has taken over the castle and also really wants to get on Celestia's nerves by keeping a pet pony.Now,Derpy is only allowed out of the castle for a hour or unless Discord says so.She knows she should go find the ponies who can use the Elements of Harmony but how can she when all that is going on is her fault?