The orphan Wen Shuying inherited her late father's medicine garden and was charged with the injustice of her father's generation. While setting up a stall to practice medicine, he ran into Gu Xingjian, who was involved in an old case at the border. The two worked together to investigate and found that the squire had colluded with the minister of household affairs to use inferior medicine to deprive the border of military supplies and murder those who knew about it. Holding the evidence of herbal medicine residues, the two traveled to the countryside and the capital, avoiding the pursuit of many parties, uncovering the huge corruption case of herbal medicines across the government and the public, and working together to seek justice for the deceased.
