Fluttershy is pregnant and Twilight barely survived an invasion.

When Fluttershy and Discord are about to celebrate their 6 month anniversary something happens to make Discord leave Canterlot and move to Manehattan, where he starts a rock back with the Dazzlings, and other bad guys.

What started off as catching a trickster quickly turned into something more when the mane 6 helped to reform Discord, and convince him to use his skills for good.