The Holy Grail of Eris

Constance Grail attends a party only to find her fiancé kissing another woman and herself accused of a crime.

The ghostly Scarlett demands that Constance repay her help by avenging her death.

Constance and Scarlett follow a tip to a masked ball with a sinister reputation.

Constance receives a summons from an investigative committee determined to put her on trial.

Constance's carriage suffers a shocking attack and an even more shocking rescue.

Both Constance and Randolph uncover fresh clues, but Lily's last message remains shrouded in mystery.