Le Chevalier D’Eon (シュヴァリエ, literally, “The Knight D’Eon” is a 24-episode anime TV series produced by Production I.G based on an original story by Tow Ubukata. The anime originally aired in Japan on WOWOW from August 19, 2006 to February 2, 2007. The titular character is loosely based on the historical figure Chevalier d’Eon, who lived in the middle of 18th century, pre-Revolutionary France under the reign of Louis XV.
18th Century, France. Lia de Beaumont, loyal servant of Versailles and its King, Louis XV, is found dead in the river Seine. Floating inside a coffin, on which the word “Psalms” was written, her body had been poisoned by mercury, thus preserving decay. According to the Church, the soul that belonged to a corpse incapable of being consumed by the soil will forever wander in the human realm, unable to go to Heaven. This greatly affects D’Eon de Beaumont, Lia’s brother and one of the king’s spies. He vows to discover by whom – and why – she was murdered. But he never expected that the one who conducting the revenge would be Lia, now possessing D’Eon’s body! And what will the knight do when this quest might risk France itself? History is retold in this supernatural tale of vengeance, loyalty and betrayal.