After his return to Equestria, Discord ended up being defeated by six ponies wielding the Elements of Harmony due to his arrogance. However, he barely manages one last move just before he's encased in stone again. Now, a pegasus pony with no name or past appears out of a thunderstorm deep in the Everfree Forest. Finding his way to Ponyville through less than fortunate circumstances, he now has to learn how to live in the town with Twilight and her friends helping him.

So what has the Princesses weary of him?

-Story takes place during Season 2