After seeing Lightning's picture in a 150 year old book; Twilight, Lightning and Rainbow Dash travel back in time to speak to Starswirl the Bearded to find out why. However, Starswirl the Bearded is not what Twilight expected and just to make matter's worse, something went wrong with the time travel spell, and it it up to the trio to work together to try and fix it.
When did Rainbow wake up?
I wonder with stories like this where the author just disappears, what happened?