After the defeat of Queen Chrysalis, Twilight angry lashes out on her friends, younger half-brother, older brother,& mentor for abandoning her and because of this, she runs away from them only to stumble upon Post-Apocalyptic Undead Earth. There she will meet the leader of a group called The Saviors, who had teamed up with an unexpected alley from beyond Equestria and she will be thrust upon this unforgiving world where the dead roam and the living are the real threat on this hellhole of a planet.

P.S. Might change it to Mature in the next chapters, so stay tuned.

P.P.S. Will change on how the Savior arc goes because I plan to make it better than Seasons 7 & 8.