(Set after the season 5 finale)

After stopping Starlight from changing history and reforming her through the magic of friendship, Twilight has brung peace and order to Equestria with the the Summer Sun Celebration starting to begin. However what Twilight and the others think will be a normal day of celebration with no worries, there in for a big surprise for they have arrived:

The Four Horsemen of the Apocalypse have come to Equestria to wreck havok! The Four Horsemen War, Pestilence, Famine and Death decide to make Equestria their personal playground of destruction and mayhem with the intent on bringing about the Apocalypse on the kingdom.

Twilight, Applejack, Rarity, Fluttershy, Rainbow Dash, Pinkie Pie and joined by Spike and the newly reformed Starlight Glimmer must band together to defeat the Four Horsemen and save Equestria once and for all.

(I hope you like this story. Like and Follow if so)