The one in black takes the key to the secret chamber. Shaoyu sends Tianming a message, asking him to meet somewhere, but Tianming doesn't know the characters. Gao Jianli sees Tianming and remembers Jing Ke. Tianming meets Gao Jianli and asks him about his father, but Gao Jianli gives no reply. The Mohists realizes someone has entered the secret chamber and taken the scroll. Tianming and Yue-er meet Shaoyu and Master Xu's Sword-founding Pool. Tianming somehow remembers he has seen the 1st-ranked sword Tianwen(Heaven Questions), the sword of Yingzheng, and knows the sword in the Xianyang Palace. He can't clean up his train of thoughts no matter what, the spell on him attacks and Tianming goes unconscious. Yue-er decides to try treating Tianming with her inner strength.
卫庄统领下的秦兵想要攻入机关城，却被城外密布的陷阱、机关阻碍。加入卫庄阵营的公输仇以机关蛇逼退了墨家的机关白虎，并与卫庄商议攻占墨家机关城的办法。
天明赴少羽之约出去找他，却在路上遇到了高渐离和雪女，两人的对话令他越发迷惑自己的身世。
天明、少羽、高月三人闯入墨家剑池，天明的咒印突然发作。
