It wasn't long since Scar took over the Pride Lands, and everyone is left now wondering what the best course of action for both Equestria and the Pride Lands future, while wondering how to defeat him with the upcoming Summit at the Crystal Empire their next best course of action.
But before any of that could happen, Kion had his new magically enhanced crown along with his sister's (really Twilight's) stolen by Sunset Shimmer, another former student of Princess Celestia's who seeks to achieve it's power leaving both Kion, Bunga, and Spike all following after the now villainous Twilight Sparkle for going after the unicorn.
There they all find themselves in a new universe where they all are all now humans in front of a high school where they meet their human counterparts who share a lot of parallel similarities to their friends back in their home world all living lives as high school students at Canterlot High with some testy tension underneath their skin deep down.
In order to get back Kion and Kiara's crowns back and stop Sunset Shimmer from unleashing her evil plan to take over both worlds, both Kion and Twilight have to work together and become Prince and Princess of the upcoming Fall Formal while having to deal with whatever trick she has up her sleeves.
But can they do it in the next three days, before their only way back to their world is closed off for the next thirty moons?
Only time will tell with teamwork and mended fences required in order to pull things through.
*Note (This takes place just after the Season 4 premiere in between Castle-Mania and Daring Don't)