That's a very fresh and interesting concept.
You can go on implementing it in several ways but here are a few ideas:
Have a menu from which you can select your desired intrigue/scandal.
From there you can see detailed info about it, like who knows about it, their depth of knowledge regarding the topic and perhaps have those people marked on your map.
For example, in the local city there lived the Dutchess.
For each visitor to the city, their knowledge about her increases either from conversation with characters with knowledge levels higher than him, local press or personally seeing her and deducing a few things about her that way.
Knowledge levels could range from none, though general knowledge all the way to top secret and characters could act differently arround a person depending on what they know about her.
For example, it's common knowledge that the Dutchess is of foreign descent, her servants know that she likes cats, but a select few know that she makes potions for them, not only that, but using her ties to an enemy nation to get the necessary ingredients!
Character skills/knowledge like anthropology, alchemy, zoology and others could allow to spot the info that is hidden in plain sight, but understood by an expert.
Then there's the extra layer: the other person knows that we know about the scandal. And to know whether the other person knows that we know about the scandal, we have to get this info somehow - either through directo contact (a person can tell us or we can tell by their behavior), spies or whatnot. It would be like two people holding a hand of cards and trying to guess what the other is holding.
I'm curious about how it's going to play out.
A good portion of the game would probably revolve arround finding the people who are "in the know" and the ways to get info out of them (friendly chit-chat, bribe, interrogation etc.). After all, knowledge is power (and likely not cheap in some circles). How about a suspition rating that attracts unwanted attention?
Just a few ideas.