Octavia and Vinyl are both, to their surprise, flying to Trottingham on the same flight. At first, this seems like a happy coincidence, but things turn sour when the engineer on board, Cogs, is killed.

With everypony on board panicking and accusing Vinyl, Octavia helps her prove her innocence and save the rest of the passengers by unveiling the real killer.

Navigating suspects such as an unhinged weather pony, two inventor brothers, and an art dealer from Prance, both ponies have their work cut out for them.

Rated teen for m-m-murder.
Spoilers may be in the comments!

"My name is Lyra Heartstrings, and you will not remember me. You won't even remember this conversation. Just like with everypony else I've ever met, everything I do or say will be forgotten. Every letter I've written will appear blank; every piece of evidence I've left behind will end up missing. I'm stuck here in Ponyville because of the same curse that has made me so forgettable. Still, that doesn't stop me from doing the one thing that I love: making music. If my melodies find their way into your heart, then there is still hope for me. If I can't prove that I exist, I can at least prove that my love for each and every one of you exists. Please, listen to my story, my symphony, for it is me."

Cover pic by Spotlight: askspotlight.tumblr.com