Celestia and Luna are sisters, toughing it out through all of the difficult times. They stuck together, even after Nightmare Moon. To them, family is extremely important.

With Nightmare Moon threatening to come back without the aid of Luna and Sombra rising once again in the empire, family is what they are going to need the most. However, what happens when the changeling queen Chrysalis comes back asking for forgiveness and reveals herself to be their long lost, and long thought dead, sister?