An alternate universe set over one thousand years after the events in MLP: FIM.
Alicorns may be immortal, but their friends certainly are not. A millennia has passed since the Elements of Harmony passed away, and none have seen the Princess of Magic in just as long. Most forget she ever once existed.

Six mares bound by fate will uncover the lost Princess of their nation, and defeat threats both ancient and new, to rediscover the lost Magic of Friendship.