Lin Yuan, a true disciple of the reclusive medical sect Huichun Valley, went down the mountain to repay the kindness the Leng family had shown to his master back then, but he met the eldest daughter of the Leng family, Leng Shuang'er, who was forced to break off their engagement by her stepmother. In order to save Leng Shuang'er who was plotted against, Lin Yuan was forced to become the Leng family's son-in-law. Leng Shuang'er was disgusted with this son-in-law who "tended to be popular and favored others", and the two became mortal enemies. Lin Yuan used his wit to resolve the Leng family's neighbors' plot and stepmother's conspiracy, and used medicinal food to help Leng Shuang'er take care of her body, gradually gaining her recognition. During this period, the two experienced drunken misunderstandings and amnesia crises, uncovering the grievances between the Leng family and the Lin family. In the end, they turned from sworn enemies into lovers. Lin Yuan became the pillar of the Leng family and achieved a counterattack.
