Inception: a dream in a dream that’s in a dream.
Fluttershy has had restless nights for the longest time. Dash asks Princess Luna for help joining dreams. The wish was granted. Everything then seems to be fine.
Meanwhile, the world is about to go crashing into a war. King Sombra decides to take down Queen Chrysalis and imprison her changelings to be his slaves to torture the society of the Crystal Empire.
Princess Celestia believes he can be stopped by planting a specific thought in his mind while he is dreaming. But, to make it stick, it has to be in the core of his brain.
With Dash and Fluttershy knowing how to wander the dreams, it is their job to teach their friends and form a team to do this task.

...always Flutterdash with a hint of Rarijack...
There's Twixie Fluff and Pinkie Pie paired with....................?

Some of these things in my stories happen to me in real life... which parts!? You'll never know... mayyybe...

I put together the Cover photo for the story... it's the Rainbow Dash of the present remembering what Fluttershy looked like when they were in their teens all upset, scared, and worried. She doesn't want a repeat so there is determination in her eyes.