Su Mo, a modern doctor worked to the bone, dies of overwork. When he opens his eyes, he has transmigrated into the body of a young physician during the Hongwu era. He had planned to lie flat, do as little as possible, and live a quiet life, but he unexpectedly binds himself to a mind-reading System that Zhu Yuanzhang can eavesdrop on the whole time. Su Mo casually grumbles about medicine and epidemic prevention, statecraft, and maritime power and industry, but the old emperor takes every remark as a heavenly revelation and national policy.
Using modern medicine, he saves Zhu Biao and stabilizes the court. He promotes high-yield crops to eradicate famine, builds an epidemic prevention system to wipe out devastating plagues, and points the way toward ocean exploration and industry. Without meaning to, he propels the Ming dynasty to global supremacy. From a laid-back physician who only wants to bask in the sun to the revered Sage of Benevolent Medicine, Su Mo lies flat while saving the world. His private thoughts shape the fate of the ages, and he becomes a legend of a transmigrator who never wanted to work hard yet is destined to be remembered forever.