A drought is coming.
Rainbow dash finds some odd dwarf Alicorns flying around when she tries to reach for the highest clouds in Equestria. They look oddly similar to Luna and Celestia. Rainbow dash gets into a conversation with them. When they offer Rainbow Dash more powers, things will never be the same again. The fate of Equestria is in the hooves of a new chosen one as a legend starts all over again, yet worse. And the chosen one is exactly the one who was the origin of the legend; Princess Luna.