After the event of Twilight Time, Apple Bloom continued with her experiment on enlarging plants. The result wasn't a scientific breakthrough.
She made crystals. In a testing tube. And so many seems to like it, they even come back for more.

They're out of job, out of ammo, and out of New Mexico.

When machine replaced their job, they retaliate the only way they could. Shoot 'em all. Like any other plan made by their helmeted friend. It backfires. The flames burned them to another problem, and another land. A land that shares similarities to their Badlands. Dead trees, scorched sand, and exchange of gunfire. Equestrian Wasteland.

There, they walk a road to intervene an old grudge. The same hatred that sent the realm they reside into the hellhole it is now.

Michael and Trevor isn't exactly the best of friends, or friends with good influence for that matter, but from time to time something, like sticking up a joint, getting chased by mercenaries, the federal government, chinese organized crime, robbing the most secure bank in the country, and local authorities always make them appreciate that they know each other.

After their last score, Trevor still have a little cleaning up to do, he ask his best buddy, Michael, lend a helping hand. In the process they were taken, somewhere, out of their world.

Like any other job they have done, they'll have to fund their way back

Casting a new learned spell, Twilight and the Elements ends up in a city on another world, where flashy carriages rule the streets, big hair dominates the head, and a decade where greed is considered good thing.
With a psycho drug dealing killer and a two-bit backstabbing lawyer on their side, they must find their way back to Equestria