With Twilight and Ruby Sparkle settling into their new positions as rulers, they oversee the transition of the bat ponies to their new home. But now that two of the Four Shepherds have appeared, Equestria must prepare itself for the rest. The next Shepherd will be unlike Sombra or Night Walker, as he threatens not only Equestria, but the kingdoms of the other races as well. Awakening from his mysterious slumber, he will carve his way across the land, intent on regathering his unwilling army. But before he manages to travel to the edges of the world, he will leave a parting gift in his wake to Rainbow Dash and four other ponies he chanced upon. With her life forever changed, Rainbow Dash prepares herself for her new fate, as well as finding her place among the ponies that share her future.