Story background: The story takes place in the rift between modern and ancient time and space. A mysterious cultural relic called the "Bone Mirror" accidentally shattered, causing historical figures from various dynasties to travel to a time and space hub called "Xuanjing Division". Time stands still here, the four seasons shine together, and buildings, utensils, and costumes from different eras blend here to form a unique "space-time mezzanine." The fragments of the bone mirror are scattered around the world. Only by collecting the fragments to repair the mirror can historical figures return to their respective eras. The fragments contain the ultimate secret about the inheritance of Chinese civilization.
Main plot: Su Li, a modern archaeological graduate student, accidentally triggered the bone mirror while sorting out cultural relics, and first met Zhang Heng, an astronomer from the Eastern Han Dynasty who had traveled through time. The two discovered that the broken bone mirror caused time and space chaos, and then they successively welcomed Qin Shihuang Ying Zheng, Han Wu Emperor Liu Che, poets Li Bai, Li Qingzhao, scientist Shen Kuo, etc. Characters from different eras often have conflicts due to conflicting concepts, such as the dispute between Qin Shihuang and Emperor Wu of Han over their governing ideas, and the collision of poetic styles between Li Bai and Li Qingzhao. In the process of searching for the fragments, everyone gradually understood the true meaning of civilization inheritance, and finally worked together to repair the bone mirror, only to discover that the mirror could not only travel through time and space, but also reflect the spiritual core of the Chinese civilization. The story ends with Su Li receiving a letter from ancient times in modern times, implying that communication in time and space is still continuing.
