The G1 ponies find a door connecting to the G4 world, and some of them form an expedition, with Megan and her siblings coming along. Ponies meet ponies, and the mane 6 are given a new gift. Meanwhile on Earth, a veteran Ranger finds himself reunited with an old friend he thought had left him. There is an impending gathering of friends old and new, where ponies will meet Rangers. Everything seems to be going fine.

But we all know that can't last, don't we? For an old enemy is plotting in secret, and will soon seize her chance.