Shochiku ; produced by Production I.G. ; original story, Tow Ubukata ; chief writer, Yasuyuki Muto ; producers, Toshio Iizuka ... [et al.] ; director, Kazuhiro Furuhashi.
In mid-18th century France, D'Eon de Beaumont earns his family's noble title, and a position in the court at Versailles, when his elder sister Lia's body turns up in a coffin floating down the river Seine. Despite the presence of his lovely fiancée Anna, a servant to Queen Marie, D'Eon eschews the court in favor of joining the secret police, so that he may investigate the bizarre circumstances surrounding the death of his sister, who was also a secret agent and accomplished swordswoman.