Born of a concubine, Tang Yunzhi suffered poisoning and harm from her legitimate elder sister Tang Xirou due to her natural sword bone. As she was near death, she was rescued by Yun Ruowei, the First Senior Sister of the Tenth Peak of the Wenjian Sect, changed her surname to Yun, and became the universally doted-on little junior sister of the entire peak. Her senior sister fiercely protected her, and her third senior brother Shen Huaizhou, a cold-faced jealous king, delivered a hairpin late at night, with her senior brothers pulling off all sorts of tricks to spoil her to the heavens. While she appeared obedient, she was actually decisive in killing; during the sect grand competition, her sword broke strong foes, she slapped Tang Xirou in the face, and when her biological brother recognized her, she also ruthlessly severed ties with him. Fighting side by side with Shen Huaizhou, mutual affection quietly sprouted, with a jade hairpin cementing their bond. However, the red-fox evil cultivator Feng Luobai appeared, and the heaven-shaking secret surrounding her biological mother Wanyan was slowly unfolding.