During the Daoguang period of the Qing Dynasty, the opium epidemic was raging in southern Guangdong. A Lian, a medical doctor from Hua County outside Guangzhou, was exterminated because of her family's resistance to opium cultivation. Fortunately, she was rescued by the hidden hero Lu Acai. Since then, folk medical skills have been intertwined with the undercurrents of the world. Government corruption, manipulation by foreign businessmen, the remnants of the Tiandihui and the powerful officials in the DPRK are intertwined. The opium profit network is deeply embedded in the government and the public.
Lin Zexu was ordered to ban smoking, and the situation went south. However, behind the ban on smoking in Humen, there were actually hidden plots of poisoning, rebellion and palace shady. Using her medical skills as a blade, A-Lian relied on her extraordinary wisdom to navigate the temples, foreign markets, and rivers and lakes, uncovering the false ambition of the "legacy of the former Ming Dynasty" to collude with British merchants, righteousness, and smuggling of opium in order to seek restoration.
Martial arts inheritance, folk loyalty, Manchu and Han tensions blend with the fission of the times. A historical unsolved case that begins with saving people and ends with saving the country slowly unfolds in the mist of Lingnan.