The heroine Ling Su is the only inheritor of the forbidden mechanism technique "Tianji". She has a blood feud and sneaks into the palace incognito. She met the powerful and scheming eunuch Wei Jie. Wei Jie discovered her amazing ability to control the "giant beast" and regarded her as the ultimate weapon to subvert the imperial power. The two began as dangerous allies who used each other and tested each other. In the bloody palace conspiracies and mecha battles, they gradually became each other's only reliance and salvation. The core point of the plot is that the heroine controls a giant humanoid mecha built with ancient mechanism skills, and "reduces the dimensionality" in the feudal palace, crushing all conspiracies and palace guards. The visual impact of palace battles and mecha battles is combined to create a unique and exciting experience.