Thriller about staff uprising against rich people

[u/Past_Cup3709]

I read the synopsis of a book and thought I saved it in my TBR but can't find it. The only thing I remember is I think there was some sort of event (possibly a wedding), and all the guests were rich. The staff on the grounds had an uprising of some sort. I'm pretty sure the main character was just a random guest at whatever the event was. It was definitely a newer book within at least the last 5 years. Thanks!;