Princess Luna is trying to find ways to remember the important ponies from her past, but is finding that it is difficult to maintain a perfect recall over the events of a long life. Then Discord gives her something unexpected to think about.
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...
One night, Rainbow decides to hit the club and hang out with her friend Vinyl. They head out to the roof to take a break from partying. What happens next may change how their whole world views love... or at least their friends and family.