France, 17th century, the age of musketeers.
He duels on equal footing with the fearsome constable Pretémenel of Paris. He surpassed in strength the Mistress who turned him into a vampire. He takes on the most impossible missions, because he is a secret agent serving an ordinary person who makes History.
The watchers are bound by the Great Agreement, which forbids direct interference in human politics. But—thousand devils!—you have to be a fool to sincerely believe that Others aren’t trying to influence events.