U weird... Seth was framed, then became a psychotic murder. Now, the Ennead are trying to take away the title of Ruler of Egypt by doing a TOURNAMEEEEENT ARC against his nephew, the son of the previous king. The later framed Seth because he is one-sidedly loved Seth.
There's a family tree that's given after the first chapter telling how Ennead appeared.
Look at the tree, I recommend you screenshot it. Then re-read the tale of Ennead's appearance while looking at the tree when needed.
Once you understand who's who you should be okay since the rest of the story is clear
im so sad, ive been following this manhwa right form the start, i bought chapters and i really like it. But i can't follow the plot very well i swear to god i tried hard, I re-read it multiple times, and I learnt the characters name by memory but still there are things that i seemingly dont get well :( so frustrating...