Rainbow Dash wakes up one winter morning to find she's been turned into a young filly. With a counter-spell farther down the line than she would like, Rainbow must learn to deal with her less-than-cool situation and save what's left of her reputation

Starlight goes back in time to stop Ponyville from being destroyed in a disaster. Twilight, having none of that, tries to reverse her meddling, only to realize Starlight may have been on to something.