Zhang ergou was just reading a book in his room, when a purple token fell on his head, which led him to becoming the one of the judges of the Martial palace.
It was an independent space where people came to seek for power....riches....authority....revenge etc from different worlds.
Judges were said to be very powerful individuals but Zhang as a judge was just a normal person, but it turns out that he had a cheat.
He decided to use it to his advantage by tricking others into thinking that he was very powerful and increase his strength.
Many thought that they knew the palace well but do they.....I don't think so.