Nyx finds herself in the Pony version of Purgatory after Twilight brings a special mirror to the Library. There she finds the lost soul of an Equestrian hero, Snowdrop.
When a young filly turns up on Twilight's doorstep, in the middle of a stormy night, coated in bruises, Twilight takes her in but is in for a shock when she discovers who the filly is.
While scavenging the library for whatever survived Tirek's attack, Twilight discovers Nyx's beloved doll destroyed beyond repair. Now Rarity finds herself trying to repair the old thing, but not without its setbacks.
Discord tosses Twilight and her family into an unexpected adventure while the rest of Twilight's friend get to work on the new crystal palace. All together, they'll do everything to ensure that Twilight and her family have a place to call home.
Can Nyx find acceptance with her extended family during Hearth's Warming, or will she find the holiday hymns are filled with nothing but hollow promises?