Equestria's greatest national park, Craterhoof Caldera has become the most feral part of the Equestrian Wasteland. Dragons roam the land, sky, and even water in the Caldera. In an ecosystem dominated by dozens of species of radiation mutated dragons, however, Ponies and the other sentient races of Equestria are at the bottom of the food chain. Follow Stutter Step, a unicorn raised by Bighorns, as he kills dragons on the trail of the one that killed his parents.