Yun Hongshen and Wen Yeming escaped in time and rushed to the church where the safe was located.Wearing weapons, he intercepted Zong Fang, who was escorting Zhu He, and rescued Zhu He. On the other hand, Ke Jingping had already arranged a dragnet at the location where the Japanese spy might be captured. Ling Han, Milan and Zong Fang fought in two groups to seize the code book. Milan and Zong FangAt the dock to divert the military commander's attention, other spies created chaos so that Ling Han could go to the church to get the code book's safe, but Ke Jingping was already in charge of the church himself.Wen Yeming and Yun Hongqi dealt with Zongfang and others at the dock, but found many spies pretending to be Ling Han. Wen Yeming concluded that Ling Han would not come to the train station and must have gone to the church.The Japanese spies launched an attack. Wen Yeming cooperated with Yun Hongqi in acting for Milan, and helped Yun Hongqi get slightly injured. He started a fierce battle with the Japanese spies who relaxed their vigilance, but Milan and Zongfang escaped.Ling Han went to church at night and fell into the trap of Ke Jingping and Yun Hongshen. Ling Han was shot to death by Gong Shiyi. Before his death, Yun Hongshen told Ling Han that he was actually Chinese and that the so-called illegitimate child was just an excuse made up by Zongfang to make him submit..Ling Han was in great pain. Before he died, he told Yun Hongshen the secret code of where the key was hidden. Yun Hongshen understood Ling Han's intentions.Ke Jingping placed the codebook in the safe in the break room of his office.Yun Hongshen already had suspicions about Ke Jingping, but he didn't dare to tell Wen Yeming.Ke Jingping set a three-day deadline for Yun Hongshen to find out the whereabouts of the key.