Su Qingci's ancient book restoration skills were inherited from his ancestors, and his mechanical design skills have hidden secrets. In an old alley workshop deep in the city, copper gears and the fragrance of rice paper and ink coexist. She uses "ancient art and new tools" as a blade to protect her family's skills that are on the verge of being lost. Unexpectedly, the mysterious opponent frequently makes moves, the mechanical devices hide murderous intentions, and the copper box left by the ancestors even involves secrets spanning two generations. Confrontations in the workplace lurk secrets, and old friends reunite with each other full of doubts. In the collision of ancient style and steam, she must not only dismantle mechanical puzzles, but also clear away the fog of people's hearts. The turning of the copper teeth is a game of inheritance and subversion, as well as a choice between emotion and reason. Let's see how she uses her sharp skills to find her own way out of the chess game intertwined between ancient and modern times.
