When Gloriosa attacks Twilight at Camp Everfree in an effort to steal her Pearl Necklace, the girls are left with too many questions. As well as their new geodes.

With no other option, Twilight turns to the only place she can think of that might provide answers: Equestria.

But when she visits her princess counterpart, Sunset goes along with her, for reasons of her own. Reasons that will leave both Twilights in shock.