Hidden Bat enters the Mohist Mechanical City. Moon Goddess demonstrates the power of Yin Yang to the Emperor and talks about the child threatening the empire, Jing Tianming, and predicts that he will kill Ge Nie. At the Mechanical City Master Ban suspects that Qin forces will not try a frontal attack, but will use stealth to breach the defenses. In an experiment, Wei Zhuang pits a Mohist machine against a Gonshu Clan snake to see which will win – the Gonshu snake. While on patrol at the perimeter of the Mechanical City Da Tiechui and troops encounter Hidden Bat.
白凤将逆流沙成员隐蝠带到机关城后离开。与此同时，秦国宫殿中，护国法师月神算出了危害帝国存亡的孩子就在机关城，并预言这个孩子未来会杀死盖聂，而且机关城中的各大门派会产生内斗。此时，机关城中，大铁锤在带领士兵巡逻，却发现一处血腥十足的地方，抬头一看，居然满树都是死去猴子的尸体……
