Having lived for hundreds of years, the long-lived immortal physician Qin Chuan, to repay an old friend's favor, pretended to be a fool and married into the Su family. For three years, his wife Su Wanqing and her family took good care of him. Until the Gu family fabricated a fake death medical dispute and monopolized medicinal herbs, Qin Chuan stepped back into the pugilist world to protect his family. With peerless medical skills, the Medicine King Order, and the Longevity Fund, he counterattacked the villains. In the end, everyone discovered that the mocked foolish matrilocal son-in-law was actually the ancestor of medical dao, and what he cherished most was the family affection of the Su family and his wife's sincere heart.