While out on a picnic, The Main Six and Cloud Kicker get a magic show from Twilight. At the end of the show, they all get whisked into a realm in side of Dungeons &Dragons.

Upon meeting the mermare, I fell in love right away, then she almost got me killed, then she got me married.

James wakes up with the worst hangover he's ever had. He then realizes he is somehow in the ponyverse, and that he has draconic qualities. He then proceeds to wreak havoc on Ponyville.