It's Nightmare Night and everyone's dressed up ready for the night's festivities! But what's this? Discord wasn't invited? Now who's brilliant idea was that? He's more than a little upset.. Oh dear...

Three months after the Changeling Invasion, things are finally getting back to normal - or at least that's what they all thought until Celestia reveals to Twilight about a terrible curse placed on her after the invasion. Can it be reversed?