Dashverse AU: Rainbow Dash, the student of Queen Celestia, finds herself in the awkward position of playing diplomat when Ember, the Dragon Lord, suddenly takes up residence in a mountain just outside Ponyville. This is attracting all manner of attention, including from other dragons.
Rainbow Dash has to find out what brought Ember to Ponyville and what's going on in the Dragon Lands. Luckily, she's being aided by a dragon expert Celestia dispatched from Canterlot. Unluckily, Twilight has a bit of a history with him, which only complicate Rainbow Dash's own efforts to muddle through this stint of draconic diplomacy.