After casting down Discord and imprisoning him in stone, Celestia and Luna become the new rulers of Equestria. Their subjects, however, are fearful of them due to their command over the sun and moon. To prove she and Luna care for Equestria, Celestia begins a campaign of befriending their subjects through acts of love and kindness.

This results in her meeting Solis, a troubled earth pony orphan with pure yellow eyes and whom never had a loving family or friends. Recognizing great potential in the little colt, Celestia adopts Solis for the purpose of raising him to be a third wheel in she and Luna's rule over Equestria. With him under her wing and Equestria's citizens faithful to her and Luna, Celestia is confident that the future of ponykind is a bright one.

Such confidence is broken, however, by Nightmare Moon's rise and subsequent defeat. With her subjects' faith shattered, Celestia's vision of a bright future starts to crumble. It's then that Solis proposes a plan to ensure such a future comes to pass, but at a great cost to them both. The fate of Equestria is in Celestia's hooves and it all boils down to one simple, yet very emotional question.

Can she learn to hate her only child?

Edited by: kyttypony and Aurora-Borealis
Big thanks to them for helping me with Ye Olde speak.