After being possessed by his sister’s soul, D’Eon awakens in the royal palace remembering nothing about the incident. Soon he is pursued by French police, and is unexpectedly aided by a young swordsman named Durand.

D’Eon spends a day with Anna, his fiance, and King Louis pays a visit to his uncle, the Duke of Orleans.

King Louis XV gives the Four Musketeers a mission, and D’Eon asks Queen Marie why his sister’s soul has not passed on.

D’Eon briefly battles Vorontsov until the building collapses. Robespierre continues the assassination plot against the Empress.

D’Eon’s battle against Vorontsov is finally finished, with Lia dealing the final blow. The Four Musketeers follow Robespierre to London.