Sunset Shimmer recieves devastating news from her previous world of Equestria. Twilight Sparkle of the human world accompanies her on her journey back home to help support her in her time of need.
A conflict between a stallion and mare leads to the Mane Six intervening. Now, when it comes to relationships, things don't always work out well. This is no exception.
Thorax has defected to the land of Equestria, taking thousands of changelings with him. When Chrysalis launches a retaliation against Equestria, Twilight and her friends must repel her invasion with one thousand changeling volunteers.
When a black and red alicorn appears in the Everfree Forest, Twilight and the others are sent to investigate. Unfortunately, this visitor is an incomprehensible mess and quickly drives the girls insane.
The Mane Six are joined by three others in a quest to use the Elements of Harmony one last time, as a brewing war between Tartarus and the free creatures of the world threatens to destroy Equestria forever.