I thought this one was a good story and a great glimpse into the Duchies of Vinci, sprinkled with just the type of detail that I like. There are a few sections, however, where it seems to stumble over itself and the description tips from vivid into overdone. I think that dialing those back just a little could make it a very strong submission.
Also (and this is just a minor nitpick), it looks like the name of the incompetent De Luca heir is Carlo at the beginning but Marco at the end - or maybe there's a brother that I missed?