Legend has it that three hundred years ago, there was a Feng Shui master named Jiang Bailu in Jiangcheng. He spent his whole life practicing to seal a hundred evil ghosts in the city and set up a "hundreds of tricks" - this game used the entire city as a chessboard and "rules" as a cage. Each sealed evil ghost is trapped in a specific location and must abide by specific "rules of survival" in order not to harm anyone. As long as no one breaks the rules, the seal will never loosen.
Three hundred years have passed, and the conspiracy has begun to unravel. The sealed evil ghost can "entrust" humans to help him break the situation - in exchange, the evil ghost will give humans certain abilities.