The scheme is bring down the final empire. The book has done its job so far to tell you that this empire has been standing for a thousand years. Kelsher thinks that maybe we could do it this time. They're going to start a house war, which mostly means kel going out at night like Batman and killing nobles and blaming it on other nobles. It just makes me think of a dorm war. And I was actually very taken with and surprised by the fact that it did wind up being a like, here is the heist explanation scene that is like charming.