The Great Physician's Legacy tells the story of how Lin Yi uses the Healing the World System to restore his grandfather's old clinic to its former glory. Along the way, he carries on the wisdom of generations of physicians, including Zhang Zhongjing, Hua Tuo, Sun Simiao, and Li Shizhen, blending ancient and modern medicine to forge a unique path for traditional Chinese medicine in the modern healthcare system. In the end, he becomes a true great physician, one who has mastered the origins of medicine and studies with tireless diligence.