Scootaloo grew up and became fairly successful. However, still lacking her Cutie Mark, she gets depressed and talks to Luna in a late night dream about what her true destiny might be. Then Discord shows up and things get weird.
As a princess, Cadence is used to the slog that accompanies any fundraiser, though it quickly becomes clear that Twilight doesn't have the same issues. That doesn't mean that Cadence can't help in her own way however.
When Twilight visits Celestia's private hall of stained glass windows, the portrait of an ancient astronomer catches her eye. Who was this pony? Why was she so important to Celestia? And why does she look so familiar?
A web of lies can make for a heavy heart. When the pony you love turns out to have hidden their whole identity, what does that mean for a relationship?