Rainbow Dash felt she was missing something. She didn't know what to do with that feeling - it wasn't quite like her old friendship problems; that felt bad, but she knew what to do about it. Look for which friends she was forgetting, and do something about that. But this was a different something she was missing now, and it still felt bad. And she didn't know what it was.

Twilight is an alicorn now. And she's almost as fast as Rainbow Dash. And more beautiful. And more smart. And more awesome. And... what's left for Dash?