In another timeline, created by the meddling of Starlight Glimmer, Nightmare Moon's plot to return and overthrow Princess Celestia has succeeded. Now Rarity is at her mercy, and finds that the lonely banished princess has taken a liking to her beauty and fighting spirit. Rarity must fight with every ounce of her mental prowess to retain her independence and her sanity.
Rated T for torture and suggestive dialogue