The idea is there's a big international conference happening in a hotel, and you are trying to gain intel and steal a McGuffin before the players on the opposing team find it or out you. You are armed with a gun, but if you actually fire it, you blow your own cover and are out. Otherwise, you can do all manner of sneaky things, attempt to turn agents of the opposing side, etc. Oh and the other thing is that it takes place in an actual hotel full of people staying there for normal reasons, and if you draw their suspicion (or, if someone witnesses you drawing their suspicion), again, your cover is blown.

That's about as far as I got.