Using the Elements of Harmony, Princess Celestia banished her sister, Princess Luna and Nightmare Moon, to the moon for a thousand years – something she still regrets to this day. Now, there is a sun without a moon. A princess without another. Two hearts, shattered like glass.

Without Luna by her side, Celestia is nothing. Without the moon, the sun has no true light.

And without her big sister to guide her and comfort her, Luna is lost. Without the sun, the moon cannot shine.