Three weeks have passed since Twilight Sparkle, Applejack, and Rainbow Dash vanished during one of Twilight's experiments, and their friends fear for their safety. When Gilda learns of Rainbow Dash's disappearance, she rushes to Ponyville to investigate herself. Trixie, meanwhile, just wants to find out what became of her eternal rival. Unfortunately, they activate the experiment themselves, sending them into a deadly new world.

They find themselves in a dying civilization, where the dead don't stay dead and live only to feast on whatever flesh they can get their hands on. Before long, they find themselves in the company of a band of humans, including an unflappably chipper man named Omid and his grumpy girlfriend, Christa. Now it's them vs. a dying world...and the much more nefarious humans who still live in it.

This is a side story to The Trotting Dead: VG by KJay and BRBeverage. Props to them for inspiration and approval.