Twilight Sparkle was sent from Canterlot to supervise the Summer Sun Celebration in Ponyville, but Nightmare Moon didn’t put in an appearance.
However, Twilight saw a certain rainbow-maned pegasus performing stunts during the Celebration, and was highly impressed—and, to her great surprise, aroused. When Dash accidentally injured Princess Celestia, Twilight had her arrested.
Now, Dash has been imprisoned in Fluttershy's cottage, and Twilight, alone in the library, is torn between her logical mind and these new, strong feelings she's having toward Rainbow Dash...
A Hunchback of Notre Dame crossover.
The Hunchback of Notre Dame and all related characters and situations © Victor Hugo, Disney
“Hellfire” tune, original lyrics © Alan Menken, Stephen Schwartz, Disney
MLP:FiM and all related characters and settings © Lauren Faust, Hasbro Studios
I created the cover image with Paintbrush by combining these images (and editing minor details):
Notre Dame Background © Disney
Twilight Sparkle by Varuuna on deviantART
Rainbow Dash by BobtheLurker on deviantART
Proof-reader and generally awesome editor: Sylocat