It has been almost one year since Nightmare Moon destroyed the Castle of Everfree, rendered the capital city uninhabitable. The court has relocated to Canterlot.

But not everything is as it seems. A mysterious sorceress has appeared, and has demonstrated her interest in a place among Celestia's court. Between her and her goal is Polaris, who has not recovered from the magic that damaged his body during the battle with Nightmare Moon.

Caught up in all of the political maneuvering is Sterling Shield, a Royal Guard. In his new posting, he guards the halls of the residence Celestia has chosen to house the government whilst the new castle is under construction. There he bears witness to the daily life of his monarch, and the proceedings of the court. But one member has caught his eye, and not in a way he ever expected.