So, I am currently watching this cdrama. 

I read that it isn't necessary to watch the previous series to understand this one. However, I am so confused with The Mystic Nine or Nine Families. I don't get any of their history, nor their motives and goals, only a little about that of the 10th Wang family, and because of it their conversations extremely bore me. I thought a lot would be explained later on but I've watched 41 out of 52 episodes now and still not much clarity. 

Can anyone explain a little bit about those families to me? I'm worried that I'll come across any spoilers if I just look it up online. Thanks!