In the capital, Qin Chonglou, the head of the Qinchao Tang pharmacy, and General Yun Zilong simultaneously seek the emperor's decree to marry the daughter of the Mo Family Medical Clinic. However, the Mo family has two daughters, the legitimate daughter Mo Jingyu and the illegitimate daughter Mo Banxia. The emperor decrees that they should draw lots to determine their spouses: whoever they draw will be their marriage partner. Qin Chonglou suffers from a leg ailment and hears that Mo Jingyu is skilled in medicine. He hopes she can cure him. Meanwhile, Yun Zilong bears a deep grudge from a blood feud. His family was implicated when there were errors in transporting military supplies and medicinal materials. He is the sole survivor, and those medicinal materials were sent by Mo Xiang from the Mo Family Medical Clinic. Yun Zilong hears that Mo Xiang favors Mo Banxia and wants to use her to obtain evidence of Mo Xiang's involvement in harming the Yun family, seeking revenge for his family. To ensure they marry the right person, Qin Chonglou manipulates the draw for the lucky bags. However, fate has its own plans, and the draw goes awry: Qin Chonglou ends up marrying Mo Banxia, while Yun Zilong becomes the son-in-law of Mo Jingyu. The two reluctant couples embark on married life, only to discover that they are indeed well-matched......