On the night of Christmas Eve, the CMCs encountered the ghosts of Apple Bloom's parents, who warned them that they will be visited by three ghosts if they don't confess to being Anon-a-Miss and make things right.
Anon-A-Miss thought they could easily manipulate their sisters into hating Sunset Shimmer. They're about to realize that they shouldn't have tried to mess with a professional.
In the face of anon-a-miss, Sunsets runs away to Equestria to get a break and finds a welcome relief in her old life as a pony. Cultures clash as her CHS friends, determined to win her back, discover just how little they know about Sunset.
After the photos from the slumber party at Rarity's have been posted on Anon-A-Miss blog, the Rainbooms go to Sunset's apartment to confront her, but when they arrived they didn't count on finding her sick in bed.