A magical accident causes the future Mane Six and their Equestria Girls counterparts to switch minds on the day the former gain their marks, and the latter meet for the first time.
Vinyl Scratch, Twilight Sparkle, and her friends are all trapped by a spell in Fluttershy's dream, a dream turned deadly by Fluttershy's pent-up frustrations.
Rarity suddenly finds herself part of the pony ride attraction in a run-down circus on Earth. She might have been able to handle this, if it wasn't also the height of the Disco Era.
Spike, Vinyl and the Bearers awaken in a far future world where Rarity rules through the power of dreams. And the only way out is by sacrificing one of their own.
Trixie returns to Ponyville, hat in hooves, to beg Twilight for the secret of her incredible power. She is more than a little surprised by what she learns.
Twilight and her friends discover that the link between them extends back in time, not just to Rainbow Dash's first Sonic Rainboom, but hundreds of years earlier.