After dying suddenly in the middle of back-to-back surgeries, surgeon Lin Wan transmigrates into the wuxia novel The Sentimental Swordsman, the Ruthless Sword as Lin Xian'er, the most beautiful woman in the martial world. Armed with modern medical knowledge and the Medical Path Tycoon System, she casts aside her former self's seductive schemes and opens a clinic in the jianghu, wielding a scalpel as her weapon and relying on her medical expertise.
At a glance, she recognizes Li Xunhuan's old lung injury. She sutures the intestines of a dying patient with her bare hands, performs public autopsies to dispel rumors, and sets out to cure the jianghu's chronic disease of survival of the fittest. With the Heavenly Secrets Pavilion hunting her, Long Xiaoyun plotting against her, and the imperial court trying to win her over, she joins forces with Li Xunhuan, A Fei, and other allies to establish the Jianghu Medical and Arbitration Alliance. Together, they set up emergency stations, establish standards for assessing injuries, and settle conflicts and grudges.
From seeking medicine in the Western Regions to saving the ruler in the capital, from exposing a virus in the rules to reshaping the order of the jianghu, Lin Wan uses a doctor's compassion and a master surgeon's precision to carve out a path of healing the jianghu amid flashing blades. She vows to root out the martial world's deep-seated ills and make medical skill a more powerful rule than martial arts.