In the adventure in which Lily Longsocks received her super strength she met a stallion sized, red dragon who, for some reason unknown to her, hated ponies. While they parted on relatively good terms she believed that she would never see him again. After all he hated ponies and wanted to stay away from them and Lily had no reason to travel back into the Everfree forest. This, however, is not the case. He needs her help and is willing to venture into pony territory for it. What begins as a single dragon seeking help despite his hatred of ponies may lead to reconciliation between ponies and Everfree Forest dragons... or not. Time will tell.
Third in the How Lily got her creepy super strength series. While the second story is not as important to this plot you may want to read the first story in order to understand this one better.