Rarity is trapped in a nightmare she cannot escape. The rooms of Carousel Boutique stretch on forever, and something dark and slithering dogs her footsteps. Where is Sweetie Belle?
Rarity has a new creation: Crystal Couture! Clothing made of crystals, held together by... something... but Sassy wants to learn how it was made, and when she does, it's and unpleasant epiphany.
After teleporting, Twilight is trapped, devoid of magic, in a pocket dimension full of corpses. At least she has a friend though. Twilight, meet Twilight.
The world is in turmoil, Equestria is on its knees, monsters hide at every corner and everypony is trapped by the physical manifestation of their innermost fears. But Rarity isn't going to let such trivial occurrences stop her from delivering gifts.