Chevalier: Le Chevalier D'Eon (シュヴァリエ, Shuvarie, lit. "The Knight of Eon") is a 24-episode anime TV series produced by Production I.Gbased on an original story by Tow Ubukata. The anime originally aired in Japan on WOWOW from August 19, 2006 to February 2, 2007. The story has also been adapted into a manga series written by Tow Ubukata and illustrated by Kiriko Yumeji, which was first published in 2005. 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.
The story begins in Paris 1742, when the body of a woman named Lia de Beaumont is found in a casket floating along the Seine. The only clue regarding her death is the word "Psalms", which is written in blood on the lid of the casket. D'Eon de Beaumont, Lia's younger brother and a knight in service of King Louis XV, takes it upon himself to investigate his sister's mysterious death, along with the strange disappearances of a number of French women. In his journey he comes across three companions to help him.