The royal wedding is over and peace has once again returned to Canterlot, but as a new day dawns over Equestria, the threat of the changelings' return still looms over the horizon. Hoping for a peaceful solution with their enemies, Princess Celestia sends a diplomatic envoy made up of six ponies to negociate a possible treaty between two very different groups. Will they be able to succeed, or will their failure only lead Equestria into much darker times?