After a long streak of failures in love, fame and wealth, Rarity has created a theory that Rainbow Dash is somehow responsible for every mishap in her life as the tactless pegasus conveniently seems to show up just in time to ruin any progress. Admittedly, Rarity's opinion of Rainbow Dash has never been high to begin with but over the course of events it has shifted from a mild annoyance into a monstrous hatred and Rarity's once good-natured soul has turned into a black venomous pit of resentment and loathing.

That's when she receives the news. Rainbow Dash is dying. And the pegasus has one final request before she kicks the bucket.