ข้อมูลอนิเมะLe Chevalier D'Eon

After discovering his older sister has been inexplicably murdered, D'Eon de Beaumont joins the French secret police--which has been investigating the disappearances of numerous young women--in hopes of solving the mystery of her death.

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.

The Four Musketeers defeat the gargoyles, only to discover they were being controlled by a man. They follow him back to his masters and realize he was employed by several important French aristocrats.

The Duke of Orleans begins moving against the Four Musketeers, and D'Eon learns something regarding Lia's death.

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.

The Four Musketeers head to Russia to retrieve the royal Psalms stolen by one of the Revolutionary Brethren.

The Four Musketeers pursue Vorontsov until he finally arrives in St. Petersburg. Here D'Eon attempts to gain permission from Empress Elizabeta to operate in Russia.

D'Eon gains the Empress' trust, and learns she and Lia were friends. Shortly after, Vorontsov and Bestuzhev carry out their assassination attempt on the Empress.