Lu Pan, the underworld's chief judge, gets caught in a bug in the reincarnation System and transmigrates into the eve of the Investiture War, taking the place of a Qi Refining cultivator with the same name. With a deadly calamity of the immortals looming, he has neither a Saint to back him nor a magical treasure to protect him. But he has the “script” for the entire Investiture of the Gods, along with five thousand years' worth of underworld-tested rules for surviving within the system. So while everyone else is fighting over magic power and magical treasures, Lu Pan is already pitching Tongtian Jiaozhu a “joint-stock reform plan for the Jie Sect,” conducting a “risk investment assessment” for Zhao Gongming, and even introducing “performance reviews” within the Chan Sect. Yuanshi Tianzun: “This man is throwing the heavenly order into chaos!” Daozu Hongjun: “This variable was not part of my calculations!” Lu Pan gives a respectful smile. “Please don't be angry, sirs. I just have a habit of... optimizing the workflow.”