With Nightmare Moon about to return, Empress Celestia sends Space Marine Twilight Sparkle across the galaxy to find 5 more Space Marines to face Nightmare Moon once and for all.
Roseluck's life had been a constant routine. But that changes when she goes to Manehattan and she becomes involved in a conspiracy against all of Equestria. Luckily for her, there is somepony who can help her, somepony who calls himself the Doctor.
Starlight Glimmer is about to get her revenge on Twilight and her friends, she just has to stop that cyan pegasus from doing her rainbow trick. But before doing so, she receives a visit from a Doctor.
Exactly ninety days have passed since Sunny Starscout did the impossible and reunited ponykind. Once her lighthouse is rebuilt, she finds an old book in Bridlewood, and discovers that a pony has been watching all along.
Ponies are going missing, and the ones that remain are acting strangely. Could it be that some old enemies of ponykind have returned, with unfinished business?
Starlight Glimmer finally graduates from Twilight's program, and is told to find a student of her own! Twilight recommends going to a new planet, inhabited by "He-you-mains". She tries to make a friend, but finds something more!
Backed into a corner with a drought, Applejack and Rarity's idyllic life on their farm is facing harder and harder challenges. When an unexpected disaster worsens a bad situation, they will have to make the ultimate decision for their family.
On the dwarf planet of Ceres, where stones are old and the ice is cold, Sunset Shimmer has to face the question of her future. Can another world really give her the perspective she needs to sort her questions out?
In the last, desperate hours before doomsday, a final, fateful rocket prepares to leave the planet and carry the hopes, dreams, and future of all ponykind with it.