It was supposed to be a late-night study-a-thon, but instead has turned into a headache for Twilight Sparkle, who winds up being the host to a very strange mare named Starling. Now on top of planning for the first Winter Moon Festival in one-thousand years and dealing with lying nobles with their political scams - she finds herself taxed by Starling's oddities.

Starling herself has no idea what to do. She is a mare with basic needs. Blank-flank or not, she's resolved to keep her secrets - and her neurotic tendencies - under wraps from one of the most beloved ponies in her country. A fresh start is all she desires, even if it isn't as simple a goal as she first thought.

But secrets can haunt worse than spirits, and even get ponies killed. On the cusp of a time where the veil between the living and the supernatural runs thin, it isn't just ghosts the Mane Six have to worry about.