During her brother's surprise wedding, Twilight meets a demon from her past that overturns the lives of everypony around her, and threatens to tear apart their friendships. Meanwhile, Twilight's enemies, old and new, close in as her spirit fails.
Twilight Sparkle, a well known unicorn in all of Equestria. That's what they all thought. Until one day, the day that was supposed to be the luckiest day of Shining Armor's life, everything changed.
Darkness is coming to Equestria once more. The Peacekeepers are going to be needed yet again, but there is one small problem: The rest of the world hates them all.