Countrywoman Liu Chuntao, skilled in martial arts, goes to the city after being betrayed by her ex-husband Zhou Wenchang, and gains appreciation from Bai Manqing to become a bodyguard. She rescues Shen Qingshan, guards Dongping Wharf, and becomes the merchant guild's first female hall master. Her ex-husband defects to become an insider, and Liu Chuntao uncovers the conspiracy of reselling supplies, smashes the arson trap, takes down the Qingzhu merchant guild, makes a name for herself in the sleepless city, and is called Lord Tao.