How deep does a friendship go?

Does surpass the conventions and taboos of society?

Does it overpower the scorn of others?

For Twilight and Spike, this has always been the case; their deep bond formed under the watchful eye of Princess Celestia during their long years in Canterlot.

But for Rarity, a mare known for her superficial view of the world, this question has always remained open, until a chance encounter reveals a dreadful secret about Spike that could drive both him and Twilight from Ponyville.

Horrified beyond belief, and pushed to the very edge of her relationship with the two, Rarity will see exactly how far her friendship to a scatterbrained librarian and her reptilian assistant will take her.