Li Shuhun, a modern time traveler, traveled through the Tang Dynasty and was imprisoned for speaking out for his fellow villagers. Changsun Wuji accidentally discovered that he was holding a dragon-shaped jade pendant related to the young prince Li Kuan. Changsun Wuji secretly arranged for Li Shu. Queen Changsun learned about it and visited him in secret, confirming that he was related by blood and recognized him as a godson. Li Shu relied on his sugar-making skills to establish himself in Chang'an. During this period, he met the father and daughter of his neighbor's family, the Yun family, and met Qin Huaiyu and other figures. He also unintentionally revealed the secret of the Tang military aircraft and the prince, and his fate was closely intertwined with the Li Tang royal family.
