Strange noises have been coming from the Everfree ever since Twilight and her friends finished repairing the Castle of the Pony Sisters. What's worse, the Princesses have disappeared, and nopony knows where they are! In desparation, Twilight turns to one of her oldest friends for aid...

Who is this friend? What horrors await in the unexplored depths of the mysterious Everfree Forest?

Read on, friend, and all will be revealed.