World view: During the Xiantong period of the late Tang Dynasty, the art of mechanism and the secret art of "Tiangong Kaiwu" were popular, and the party struggles in the court were intertwined with the forces of the rivers and lakes.
● Main plot: The lowly criminal Shen Wujiu and the machine engineer Cui Lingyi solved 16 "Tiangong murder cases" and uncovered the military-industrial conspiracy that shook the foundation of the Tang Dynasty.
