2019. The world that Sunset Shimmer fled to years ago has now turned into a dustbowl of a wasteland. With invaders having reduced their home into nothing but rubble, Sunset Shimmer, her friends, and many others have fled Canterlot and built themselves a cooler, more mature society. They call it, Apocalypseburg. Show any weakness and you'll be eaten alive. This new life has toughened and hardened everyone... well, almost everyone.
Small crossover with Lego Movie 2 and other Hasbro properties. Watching Lego Movie 2 is not required to understand this story.