In the old times when Discord ruled all of Equestria, an Order was being composite by him. an Order who will take care of him in times of need, an second option if there something was wrong.
Now after centuries is Discord free again from his stonen tornement, but unfortunately it was only for a day. The Elements of Harmony beared by Twilight and her friends blasted him into stone again!
Now it's up to the Order to get revenge on the mane six and get Discord a second chance at freedom again, but one stallion has other plans then revenge.

The cover art is from: ItsfromPeople