Ling Han was discovered following Yun Hongshen. Before returning to Chongqing, Shi Changsheng asked Ke Jingping to deal with Ling Han's problem secretly. Ke Jingping realized that Ling Han had lost his status in Shangfeng's mind.Secretary Wu also became the target of secret execution. Gong Shiyi led the execution, but Captain Tang and Lao Hei rescued Secretary Wu. The escaped Secretary Wu acted as a contact person and told Yun Hongshen that he had officially joined the party, and informed Yun Hong that Shen Ling had officially joined the party.Han’s true life experience.At the military intelligence meeting, Yun Hongshen informed Milan that he was a Japanese agent, Guiteru. Wen Yeming also provided evidence that Milan had forged his identity, and based on the clues, he concluded that Ling Han was Guitetsu's agent. At the same time, Zongfang's traces were found, and Ke Jingping ordered the arrest.To arrest Ling Han and Zong Fang, Ke Jingping has decided to let Ling Han die in the line of duty to avoid the political risks caused by his identity as a Japanese spy.During the arrest of Zongfang, a fierce battle broke out between the military commander and the Japanese, and Yun Hong deeply realized that he had fallen into a Japanese trap.At this time, Ling Han used Yang Ziming's last words to find the code book in Lushan Temple, and the spies under Milan Zongfang had been eliminated by Yun Hongshen's team.