Professor Ren Xinzheng resigns to start a mentoring class for traditional Chinese medicine, hoping to train true successors. His studentsâSun Toutou, his son Ren Tianzhen, lawyer-turned-student Yang Xiaohong, pediatrician Peng Shiyan, and aspiring doctor Zhao Liquanâstruggle to get along, but must work through their differences to preserve the legacy of Chinese medicine.