Shopkeeper Liu of Renji Pharmacy bullied Old Li and his daughter Li Rong at their herb stall, attempting to force them to sell their top-grade wild huangqi for only three qian of silver. He threatened them with the fate of Wang the Fifth, who had been ruined for offending Renji Pharmacy. Shen Lingyi intervened, using her knowledge of the pharmacy's policies and Second Young Master Zhou's willingness to pay fair prices to expose Liu's scheme and resolve the conflict.