Fluttershy discovers a weird creature that crash-landed in her yard. However, when the creature turns into a human before her very eyes, little does she know that she's in for a wild ride!

Through a mishap with a bust up involving Luthor, the Justice League and their nemesis find themselves in the land of Equestria. With the League finding refuge with the mane six and the princesses, Luthor himself allies with an enemy of their own plus many others, giving them an offer the can't refuse. When two heroic sides and two villainous sides cross paths will the balance of harmony in the land be saved or destroyed?