"Chang'an Stars" takes the supernova explosion in 1054 as a historical turning point, igniting the scientific revolution in advance during the prosperous Tang Dynasty. When the "guest star appears in the daytime" shocked Chang'an, Li Guanxing, the supervisor of Sitiantai, was caught between imperial power, Confucianism and conspiracy. He shouldered his father's injustice and vowed to build a star observation tower to gain a glimpse of the secrets of the sky.
Pei Mingyue, a female math genius he was forced to accept, used elliptical orbit calculations to shake up the geocentric theory, but was forced into marriage by her family and plotted against her by gambling. Shaolin master Huikong polished the first telescope in the Tang Dynasty. The telescope pointed at the truth of the universe and became a murderous weapon in the eyes of the general. The three were forced to form "Boundary Crossers" to protect the discovery that was about to overturn the world amidst the pressure from the court of Grand Tutor Changsun, the intimidation of General Guo Wei, and the crazy destruction of the Purification Cult.
However, when a star-devouring shadow appeared in the halo of the guest star, and when a star map prophecy spanning hundreds of years appeared in the Sui Dynasty underground palace, they finally realized that what they were spying on was not only the secret of the starry sky, but also a civilization's survival situation that had been planned for forty years. Above the sky, truth hangs high like a sword; in this world, everyone is a chess player and a star to be observed.
