Lin Yue, a social worker with a double major in modern history and engineering, died suddenly due to overtime work and traveled to the Qin Kingdom in 238 BC and became a slave. He relied on historical prophets to predict the rebellion of Lao Ai Yu's party and rescued Ying Zheng. He also used a simple compass and soap to gain shelter and stay at Ying Zheng's side.
Since then, Lin Yue has repeatedly used modern skills to break the situation: when destroying Korea, he introduced the lime moisture-proof method and improved the wheelbarrow to solve the logistics crisis; when defeating Zhao, Chu and Yanqi, he designed and improved ladders and trebuchets, created post transportation, compressed biscuits, and built signal towers to transmit military information and create an economic blockade, helping Yingzheng gradually destroy the six countries. During this period, he and Mo Li, a female disciple of the Mo family, went from conflicting ideas to falling in love with each other. They worked together to improve equipment and save lives and injuries.
In the process, Lin Yue had to deal with the rejection of old officials and the suspicion of Ying Zheng. He also had to balance modern concepts and ancient etiquette. After reunification, he opposed "burning books and humiliating Confucian scholars" and reached a compromise with Ying Zheng. In the end, the Qin State unified the world, and Lin Yue also found a sense of belonging in troubled times, and had a happy relationship with Mo Li, while thinking about his own destiny in the New Deal.
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