Xie Wuji, a disciple of Kunlun, returns to the mortal world carrying the Qingming Sword Embryo and the Divine Body-Refining Art, bearing the legacy of an Immortal Venerable. Seeking his family and old friends, he vows to protect his younger sister and bring peace to the world. He slays evil spirits, resolves crises, and uncovers conspiracies. Alongside Wang Jiaxin, a devoted and resilient woman, and Qin Min, a gentle and healing presence, he protects his younger sister, Xie Zhiruo, as she grows up while preserving her innocence. From the turbulent world of the city to calamities threatening the Three Realms, he breaks free from the fate of sacrifice, redefines the laws of the universe, and follows the path of protection, ultimately becoming the universally recognized Urban God of War of the Three Realms and the Guardian of All Worlds.