Stable 413 is one of the few stables that did not destroy itself. Its community is united in friendship and harmony, none more so than the sisters Ruby, Diamond, Obsidian, and Topaz. Together, they brighten the stable in their own ways. Sadly, their peace could not last.

After a fierce raider attack leaves the sisters the sole survivors of the stable, they are forced to venture out into the wasteland with their savior: the prewar unicorn Facet, who will say nothing of his past. Together, these five ponies will explore the dark and dangerous lands of the shattered Equestria.