全书主要讲述：唐武德四年。尚药局奉御孟贞元被卷入皇权争斗之中，被同为尚药奉御的韦义仁陷害致死。孟家举家被诛，只留下孟贞元之妻柳桂芩和其腹中怀胎八个月的孩子被尚药局主药使令孟常所救。因缘际会柳氏与孟常结为夫妇，并诞下一子孟诜。孟诜自幼喜好医学，但一直被母亲强力阻止，后与韦桓、张翰结为异性兄弟。身世之谜解开，孟诜发心立志学医。拜师学艺途中，先后经历儒医、佛医、道医、侠医、巫医等，深为医学的博大精深所折服，后因精诚所至成为药王孙思邈的关门弟子。为追求更高境界，弘扬医道，考入太医署，因医术高超，进入尚药局，几经倾轧与波折，终成为尚药局高长官奉御。因其在食疗方面做出的前所未为的贡献，被唐高宗封为"大食医"，赞其医之大者，为国为民，成为一代苍生大医。（Synopsis: In fourth year of Wude under the Emperor Gaozu of Tang's reign, Meng Zhenyuan, doctor of the Imperial Medical Department is involved in a struggle for the throne, and framed by his colleague Wei Yiren. He and his entire family are killed, with only his wife Liu Guiqin, who has been pregnant for 8 months, saved by the medicine director of the imperial medical department Meng Chang. Eventually Liu Guiqin is married to Meng Chang before giving birth to a son, Meng Shen. Men Shen shows in interest in medicine since an early age but his mother tries hard to prevent him from learning medicine. Later Meng Shen, Wei Huan and Zhang Han become sworn brothers. After learning the truth about his father and family he resolves to become a doctor like his father. As an apprentice he acquaints himself with the Confucian medicine, Buddhist medicine, Taoist medicine, xia medicine and shaman medicine, etc, and is deeply impressed by the broad and esoteric discipline. Later his wish to learn medicine is so strong and genuine that he is accepted as the last disciple of Sun Simiao, China's King of Medicine. To pursue higher learning and promote the way of medicine, he passes the exam and is enrolled in the Imperial Physician Division, later assigned to the Imperial Medical Department due to his superb medical skills. He experiences many internal strife, trials and errors and finally becomes the director of the Imperial Physician Division. To recognize his unprecedented contribution to dietetic invigoration, Emperor Gaozong confers upon him the title "The Great Physician of Dietetic Invigoration" to praise his greatness in medicine, and his beneficence to the country and people. ）