The protagonist, Lin Jing'an, and Lin Mo both die unexpectedly at the same time through a twist of fate. For no apparent reason, Lin Jing'an transmigrates into Lin Mo's body. At first, he struggles to adjust and refuses to accept that he has transmigrated. He tries every possible way to return to the modern world, but none of them work. Eventually, he gradually comes to terms with his situation. Using Lin Mo's identity, along with his modern way of thinking and store of knowledge, he improves farm tools, fertilizer, and living conditions, proposes numerous theories far ahead of their time, and designs all kinds of advanced inventions. Before long, he has caught the attention of the village head, county magistrates, dukes, and even the Five Great Clans and Seven Noble Houses. He goes on to improve metallurgy and firearms, develop new battle formations, and invent horseshoes. Drawing on his familiarity with modern law from before his transmigration, he also gradually revises and improves the laws of the Tang dynasty. With his outstanding abilities, he brings about enormous changes in the early Tang, transforming the entire Zhenguan era into a true Golden Age of Zhenguan. Along the way, he falls in love with a daughter of the Taiyuan Wang clan, one of the Five Great Clans and Seven Noble Houses, as well as a princess of the imperial family. Their path is rocky, but in the end, the lovers are united. The protagonist earns honors for his wife and descendants, and finds success in love, career, and family. After changing the Tang dynasty, he sets out overseas and becomes a king in all but name in Australia, living freely between heaven and earth. The end.
