Modern office worker Shen Ruobing unexpectedly time-travels, taking over the identity of Hanshuang Sword Ancestor, the celestial cultivation world's ceiling of combat power, but with her cultivation completely lost, and her speech and behavior forcibly controlled by a persona system. She originally wanted to low-profile run away, but every move of hers was misinterpreted by everyone as profound sword intent. Along the way, forced to break through barriers, get acquainted with cold and detached sect leader Rong Heng, blackened disciple Li Cangming, and Demon Emperor Chong Li, she successively resolves multiple crises, uncovers space-time and a hundred-year old grievances, finally awakens her power, joins hands with partners to pacify the catastrophe, and freely wanders the three realms.