Life was pretty good for Rarity. With her own business, she had the best friends anypony could ask for and a loving (if slightly annoying at times) sister.
But nothing ever stays the same forever.
After a traumatic accident within the family, Rarity is forced to care for Sweetie Belle, learning how to be the best sister she can possibly be. Yet old memories resurface and she will be forced to confront her own upbringing too.