Modern young man Chen Yu, who is a history buff, accidentally comes into contact with a mysterious Tang Dynasty bronze mirror and travels to Chang'an in the early years of Zhenguan. When he first arrived, he was penniless and experienced embarrassment on the streets. He relied on modern marketing knowledge to help small shops turn losses into profits and struggled to gain a foothold.
Chen Yu rose to prominence in a gathering of literati, met the talented Li Tai, and told him about modern technology and democratic systems. Li Tai was shocked, and the two became close friends. When he was out, he heroically saved the beauty, met Wu Jue, imparted knowledge, and made Wu Jue fall in love.
Coinciding with the drought in the Tang Dynasty, Chen Yu relied on his experience in modern water conservancy and disaster relief to offer suggestions to Li Tai and then made suggestions in the court. Although his remarks were shocking, he won the support of Wei Zheng. Some of his suggestions were adopted by Li Shimin, successfully mitigating the disaster, and thus emerged in the court.
However, his rise aroused dissatisfaction and secret slander from the conservative forces; Prince Li Chengqian was afraid of his influence and Li Tai threatened his position as prince, and targeted him everywhere. When the reform was implemented, there were many obstacles and social unrest, and Chen Yu faced the crisis of being accused. At the critical moment, Wu Jue ran around and united with people of insight to plead for mercy; Wei Zheng argued hard and supported Chen Yu.
In the end, Chen Yu optimized the reform plan. With the assistance of Li Tai, Wu Jue, and Wei Zheng, the reform was on the right track, with remarkable results, and the Tang Dynasty became stronger. His relationship with Wu Jue warmed up, and they worked together in the Zhenguan era to use modern concepts and knowledge to set off waves of storms that changed the direction of history.
