After the royal wedding, a new changeling hive makes its presence known and wishs to open diplomatic relations. Twilight decides to use this opprotunity to learn more about them, but ends up getting far more than she bargined for.
With Sombra threatening pony and changeling alike, Chrysalis and Celestia begrudgingly agree to an alliance. Neither is happy at first. Yet, as they work together, they discover lasting peace, and perhaps more, is possible.