Princess Luna disappears from Equestria with hopes of saving the world and is accompanied by the enigmatic Sombra. Meanwhile, Celestia tries to bury secrets as immortal as she is and Cadance must choose her loyalties carefully...
All Celestia ever wanted was to be on the sun control team, but the North is freezing, sinister schemes are in motion, and her world needs heroes – before it's too late.
Tomorrow, Cadance will turn six hundred and forty eight. Luna decides to visit her ahead of time, in her dreams. One thing is for certain: it will be an unforgettable night.
Luna is a mischievous filly loosely raised by her sister in a vast world that doubles as the home she barely remembers. Neptune is a humorless king who refuses to leave his home, both of them share a distant past although their paths have split.