Lin Jiulang interrogates He Fu over the reason for the assassination and demands that he implicates He Zhizheng and the Crown Prince. He Fu remains tight-lipped and insists on staying silent until he is formally tried in a court of law. Li Bi is imprisoned in a dungeon in the underground city of Pingkang district. Despite repeated requests to be released to carry on with his investigation and save hundreds of thousands of lives in Chang’an, his words are dismissed by the jailers as nonsense.
林九郎逼问何孚行刺的缘由，让他供出何执正和太子，何孚闭口不谈坚持等三司会审再讲明真相。李必被关在平康坊地下城的私牢里，他反复说明要出去查案，这关乎长安城数十万百姓的性命，可看守当他说胡话对他置之不理。武侯发现张小敬在平康坊，想要击鼓抓捕时被姚汝能强行赶走，姚汝能击鼓传信“不退”，就是想通知张小敬不要撤退。李必决定帮阿枝治病，他熬了外敷药膏，让阿枝的哥哥帮她涂在伤口上，阿枝的哥哥对林九郎恨之入骨，答应护送李必离开地下城。
