The Holy Grail of Eris

Connie, the plain and ordinary daughter of a viscount, is saved from a predicament caused by a spiteful young noblewoman’s harassment when the ghost of a beautiful woman suddenly appears. The ghost’s name is Scarlett Castiel. She was a duke’s daughter executed ten years ago, notorious as a wicked woman unlike any other! In return for her help, Connie finds herself tasked with tracking down the culprit who sent Scarlett to the execution block. But as she undertakes undercover investigations, a sham engagement, and even a confrontation with powerful nobles, a conspiracy far greater than she ever expected begins to emerge—!? “Devote the rest of your life to making my revenge succeed!”