After cracking the codes on Luna's personal diary, Twilight Sparkle uncovers a thousand year old conspiracy. Luna wanted to come home and apologize after her banishment was over. What happened to make Luna return as Nightmare Moon?

Twilight must race against to time to uncover the truth, and save not only herself, but the rest of the world.

Big thanks to Zephyr for encouraging me to continue the story far beyond what I had originally planed.