Styxx Rivers is the infamous undertaker pony of Equestria. When a certain order for a murdered family falls into her hooves, she ends up in a situation she cannot fix alone. She goes to the princesses for help, and this leads to Luna taking Styxx under a protective wing. The undertaker pony soon realizes the beautiful, mystifying lunar princess is the type of pony she needs.

All while having to catch the serial killer.

(Rated T for sexual innuendos, sexual scenes, language, and dark themes and scenes.)