The middle gate has opened and, through it, lies the most dangerous universe of all: ours. A teenage brony has found a crack in his bedroom. Upon being sucked through it, he finds himself in a place he never thought he'd ever visit: Ponyville. While trying to get over the fanboyness he feels upon arriving (and the fact he's now a pegasus), he discovers something about himself that he wasn't prepared for.

Meanwhile, it's been a few months since Eggman was last in the pony universe, and he really wants to get back. He misses not only the ponies, but also his best and only friend, the Doctor. Now, he thinks he finally has found a way back.