An accident causes Celestia to end up in a frontier town amid the wilderness without her memories, leaving Twilight Sparkle feeling devastated as Luna tries to help her—plus, there's a little mystery to solve.

Certain TAGS that apply to this story are spoilers and will be added only when the relevant chapters make them unavoidable—there IS a mystery to reveal in due time, after all. Have fun figuring it out

My other two stories are pretty good sized and I've been bouncing between them on posting chapters. But since those chapters are rather large and highly detailed, I thought to post this in increments to pass the time. This is story is completely unrelated to my others and it has considerably few chapters, with a new chapter to be posted about 1/wk.

Okay, a few words about the points to award:
1 point for the first one to guess the origin of the "crossover" in this story -- that's way too easy.
5 points for the first one guessing who Tumbleweed is from that "crossover" series -- not so easy
10 points for first one who guesses Filly's partner prior to Ch 6;
5 points for first one to guess who she is if no one has by Ch 6 but before Ch 7;
0 points if after, because the answer will have been given.
25 points for first one who guesses the overall mystery of the story prior to Ch 10;
15 points for first one to guess what's going on if no one has by Ch 10 but before Ch 11;
0 points if after, because the answer will have been given.
Again, just have fun

oh, and a bonus of 20 points to whoever can guess the "crossover" that's referenced in "Night the Lights Went Out in Canterlot"

Picture source: http://www.melodyranchstudio.com/