College student Zheng Shaopeng was knocked unconscious by a heavy history book at home. When he woke up, he found himself in the Danzhu Dynasty and transformed into a poor scholar Yang Lin. In the era of internal and external troubles, Yang Lin experienced wars and witnessed the suffering of the people. With his wisdom and ability, he won a place in the court and gradually led the Danzhu Dynasty on the road to becoming a strong country by controlling corrupt officials, resisting powerful enemies, advancing science and technology, and breaking superstition.