On Nightmare Night, Twilight decides to bring her doll, Smarty Pants, with her to the festival. While visiting the abandoned castle where the sixth element of harmony was located, she finds a strange gem that zaps Smarty Pants. Ignoring the event Twilight goes home. The next night, she finds that the doll isn't where it should be. Every night, the doll seems to be getting closer to the elements of harmony. Turns out, the doll has seen more than just Twilight and her old toy box. Twilight goes to Zecora, who will hopefully have the answer on what's going on. However, Zecora refuses to tell what is happening. Now Twilight must take matters into her own hooves.