<p>Earth-pony inventor Twilight Sparkle and her friends discover a world unlike any they've seen before -- a world of fire. And it may offer clues to the history of all the varied worlds of the Space Beyond. But only if they can manage to escape its dangerously powerful inhabitants...</p><p>For more of this AU, check out the entire series, starting with:</p><ul><li><a href="/story/514061/when-ponies-fly" rel="nofollow">When Ponies Fly</a></li></ul>