After experimenting on her schoolmates' magical music abilities, Sunset Shimmer is haunted by glowy pink butterflies. Surely there's a reasonable explanation for this. Surely.
Curiosity finally gets the better of Princess Luna, and she slips through the crystal mirror to the human world. She finds a liquor store filled with what looks like bottled magic potions and wants to test them, of course. What can possibly go wrong?
As punishment for her crimes, the Elements have cursed Sunset Shimmer to do favors for anyone who asks. Lucky her. And then there's that other Twilight Sparkle she keeps running into...
Shortly after being accepted by Twilight's friends, Sunset begins to wonder if they are just being nice or if she is really their friend. She goes to Fluttershy to ask for a strange favor: will she give her a hug?