The protagonist Gu Changsheng is the guardian of the former imperial tomb. He has a humble status, but unexpectedly awakens the talent of gaining insights and rewards by "signing in" at a special place. He silently signed in a corner of the imperial mausoleum for hundreds of years, and obtained countless long-lost magic skills, alchemy tools, formations, and strategies. A hundred years later, the undercurrent of the new dynasty was surging, the imperial power was unstable, and the world was in turmoil. All forces gathered in the imperial mausoleum to find the secrets of the previous dynasty. In order to seek purity, Gu Changsheng had to take action in secret again and again. In his humble capacity as a mausoleum guard, he repeatedly resolved monstrous crises and shocked the world. He got acquainted with Feng Zhaoxue, a female general who was responsible for her family and country. The two went from suspicion to joining forces to fight against the mastermind who wanted to subvert the world. Finally, when the world collapsed, the world was horrified to discover that the guardian of the imperial mausoleum, who had been ignored by everyone, had long been the only myth in the world.
