Matthieu Chalaux made me discover this comic, which is, I believe, a good inspiration for Blades in the Dark (for French speakers) in a “Les Rois Maudits” mood.
Here’s the summary translated in English :
“Although being of low birth, so-called The Sad Sir is one of the most feared and respected figures in the kingdom. Officially, it serves the cause of his sovereign, King Philip Augustus, which he provides bodyguards. But in the shadows, supported by his formidable spies and thugs, the Ribauds, he monitors, handles and sometimes eliminates those who get in his way in the shallows as much as the courtyard. But the heart of winter 1194, savagely murdering a Bordeaux merchant, he will make a mistake that could lead to his downfall. Indeed, on the floowing day of his act, he learned of the king’s mouth that this trader was one of his spies, responsible for foiling an assassination attempt. It is then loaded by the ruler to find the “murderers” of the Aquitaine merchant”.