"In October of 1806, the Little Season is in full swing, and Sally Fitzhugh has had enough of the endless parties and balls. With a rampant vampire craze sparked by the novel The Convent of Orsino, it seems no one can speak of anything else. But when Sally hears a rumor that the reclusive Duke of Belliston is an actual vampire, she cannot resist the challenge of proving such nonsense false. At a ball in Belliston Square, she ventures across the gardens...

Leaving Harvard to complete her dissertation on the Scarlet Pimpernel and the Purple Gentian in England, Eloise Kelly discovers information about the most elusive spy of all time, a figure who single-handedly saved England from Napoleon's invasion.

To stop the French from getting their hands on Queen Maria, who was spirited away by a group of loyalists, Jane Wooliston, the Pink Carnation, must team up with a rogue agent named Moonflower, who is brilliant--and insubordinate.