The story takes place in the "Rust Era" when the resources of "Lütie" are on the verge of exhaustion and the time sequence begins to become disordered. Fifty-one-year-old mortal craftsman Su Menglu was forced to embark on the path of cultivating immortality because of an accidental repair of the "Jiaowei Yun" of the guqin, which touched the silent "Ten Thousand Dharma Return to Yuan Ti" in her body. She started from the lowest level of "Fan Tie Kaiguang" and struggled to survive in the abandoned "Lv Iron Mine". She got acquainted with the "dying leader" Mo Shuigui who was plundering in order to extend the life of the sect and was full of inner conflicts, and the rule messenger "Lv Wushen" who came from the dimension of order and carried out the "purification" task indifferently. In the process of practicing "Wanxiang Senluo Slash" and "Taichu Hongmeng Step", Su Menglu constantly reconciled the fierce conflicts between Tao and law caused by the fusion of different "laws" in her body, and was involved in the grand conflict between "resource plunder" and "rule purification". She wanders between fragments of history and fragments of the future, searching for the source of silence in the sea of notes. In the end, she did not prove the truth with force, but with the wisdom and tolerance of a middle-aged person, she found the true meaning of "returning to the origin" - letting the chaotic time sequence flow again, turning the harsh noise into harmony, and turning herself into an "iron rule" that reconciles all laws, returning to ordinary life and the rhythm of nature. ",