Review Detail of Sutradna in The Serpent Emperor

Is it just me, or did the synopsis say something about a princess, a king and a historical setting? I can't find anything of that inside this book. Does my app not work properly or did webnovel mix something into the wrong place? I'm sorry, but with this, I can't write a good comment. It is more like, neutral. PS: On the internet you can find the real book.