Twilight Sparkle discovers something in the Everfree Forest. Something that nopony had seen for hundreds of years. A Stargate. A wormhole linking Equus to the rest of the Pegasus Galaxy, not to mention to the home planet of the bipedal race that used to be Equestria's biggest ally before the Equestrian government, headed by Princess Celestia herself, decided that it was time to shut it down for good.

But will that race still be there after all this time? Only one way to find out.