This story is a sequel to Past Sins

Hearth's Warming is a time for friends and family to come together, celebrate harmony, and welcome the new year. Nyx is looking forward to just this as she rides the train to Canterlot with Spike and Twilight. She's going to meet her extended family for the first time and wants nothing more than to make a good impression. Yet, the sheen of the holidays can't hide the trouble caused by meddling grandparents, relentless reporters, and a paranoid uncle.

As an immortal alicorn princess, Twilight Sparkle has lived for a long time. However, her friends were mortal ponies, and they eventually all died. A hundred years after they have all passed on, Twilight can only think about them, and how much they meant to her. Now that they are nothing but memories, how can she carry on?

The answers she seeks may come from a most unexpected source: another alicorn, one who once threatened to cover Equestria in eternal darkness, but whom Twilight considers a daughter. With her help, Twilight might just find that she is truly not alone.

This story takes place after the events of Magical Mystery Cure and Past Sins, which was written by Pen Stroke. Nyx and Past Sins belong to Pen Stroke.

Also, check out this CinemaSins-Style review.