"The Stranger in Zhenguan" tells the story of Li Ye and Zhou Zhiruo, who became attached to the study of physics and worked together during the Zhenguan years. The two of them combined the wisdom of studying things and the way of martial arts to solve the conspiracy of the Tiangong Pavilion, quell the star crisis in the Western Regions, stabilize the turmoil in the court, and use their ingenuity to improve people's livelihood tools and spread the science of studying to all directions. From adventures in the rivers and lakes to court affairs, from acquaintance at a young age to staying together for a lifetime, they guarded the lights of thousands of families in Chang'an with their "merging of latitude and longitude", and wrote a legend with warmth and wisdom that integrated the righteousness of the family and the country, the heroic feelings of the rivers and lakes, and the true interest of the world, interpreting the true meaning of "investigating things and understanding the mind, and martial arts to protect students"