When Celestia and Luna decide to retire and hand off the ruling of Equestria to Twilight and her friends, it sends Twilight into a tailspin of self-doubt. Meanwhile, the ancient villain Grogar bands together a legion of nefarious characters to conquer all of Equestria, but a restored King Sombra has conquering ideas of his own.
As Twilight and the rest of the Mane Six struggle to come to terms with the destruction of the Tree and Elements of Harmony, King Sombra sets his sights on conquering all of Equestria.
The Young Six respond to a magical summons from the Tree of Harmony, only to learn it has been destroyed, and it is up to them to figure out how best to memorialize it.
Twilight and Shining Armor pit their wits against each other to settle a long-standing sibling rivalry score - but they soon discover they're not the only competitors.
Twilight realizes she never returned a book to the Canterlot Library, and besides incurring the disgrace of a super-overdue book and huge fees, she may have caused her favorite librarian to lose her job.
Rainbow Dash's old pal Quibble Pants needs help to bond with the daughter of his new special friend because, like Dash, she's a real sports pony.
When Sandbar asks Yona to a pony dance, she goes to Rarity and her friends for a makeover in appearance and personality.
Grogar sends his legion of doom on a mission to become allies, but his plan works too well and they almost become friends.
Smolder returns to the Dragonlands with Spike and Fluttershy to help cheer up her sensitive brother, but when they arrive they discover the dragon eggs aren't hatching.
Applejack's plans for an orderly harvest go awry when Apple Bloom becomes obsessed with catching a magical creature she thinks can help them.
Starlight Glimmer relishes her role as school counselor and encourages the students to come to her anytime about anything, but she becomes overwhelmed and learns a lesson.
Unexpected visitors to Ponyville threaten to break up the Cutie Mark Crusaders forever.
Luna and Celestia take a sister vacation while Twilight and her friends struggle to cover the princesses' many royal duties.
When Pinkie Pie seeks help from her old friend, the super-silly Cheese Sandwich, in finding her life's purpose, she discovers the unimaginable has happened
The School of Friendship is starting a buckball team and Rainbow Dash has to come to terms with the fact that she won't be coaching the team
Twilight's hopes of keeping her Trivia Trot winning streak alive are waylaid when she's unexpectedly paired up with Pinkie Pie who has never been to a trivia night before!
Twilight is determined to make Celestia and Luna's last Summer Sun Celebration memorable, but things start going horribly wrong.
When Fluttershy's and Angel Bunny's relationship hits the skids, Zecora gives them a potion to help them understand each other.
Rarity worries she's done something to upset Spike when he stops making time for her.
Starlight decides to hire a Vice Headmare in preparation to take over the School of Friendship from Twilight. But she soon realizes that hiring the right pony for the job is going to be a lot harder than she thought.
When another author releases his own version of the events in AK Yearling's Daring Do books, Rainbow Dash is furious, while Fluttershy is curious to know the truth.
When the Cutie Mark Crusaders are magically transformed into grownups, they discover that growing up the right way means gaining experience and wisdom that simply can't be rushed.