Wen Yeming points her gun at two trainees, asking if they want to know who killed Instructor Teng and demanding their cooperation. She plays a recording of Yun Hongshen stating that Zhang Hua applied the cyanide to Teng’s dagger. Zhang Hua dismisses it as mere speculation and accuses Yun Hongshen of slander. He argues that people act desperately in crises, implying Yun Hongshen is framing him for self-preservation. Zhang Hua insists he won’t let Yun Hongshen succeed. Yun Hongshen notes that Zhang Hua neither confirms nor denies the accusation, suggesting he’s trying to gauge whether Yun Hongshen has evidence.
Zhang Hua claims Yun Hongshen has no proof and questions his presence in Teng Ping’s dormitory. Yun Hongshen reveals he found cyanide in Zhang Hua’s possession and accuses him of attempting to frame Teng Ping for poisoning himself. Zhang Hua mocks Yun Hongshen’s storytelling skills. Yun Hongshen brings up the car accident three days prior, stating the driver, Qian Dahai, who delivers supplies to the base, was the culprit. Zhang Hua anticipates the next question about Qian Dahai’s alcoholism and deflects responsibility to Ke Jingping. Yun Hongshen suggests that Qian Dahai was working at the base as a favor from Ke Jingping, who Qian Dahai once saved.
Zhang Hua questions the connection between Qian Dahai and the current situation. Yun Hongshen explains that Qian Dahai wasn’t planning to drink that day, but Teng Ping gave him a bottle of Moutai, knowing he was an alcoholic. Qian Dahai’s autopsy revealed his stomach was full of alcohol. Zhang Hua asks how Yun Hongshen knows Teng Ping provided the alcohol. Yun Hongshen points out that Teng Ping is from Moutai and recently received a case from his family. He then produces the Moutai bottle from under Teng Ping’s bed. Yun Hongshen concludes that Zhang Hua, not Qian Dahai, was driving the car that day.
Zhang Hua challenges Yun Hongshen’s claim of seeing him drive. Yun Hongshen admits he didn’t see him, but he smelled strong alcohol on the passenger side and noticed scratches on Qian Dahai’s hand that match the scratches on the passenger door. Yun Hongshen deduces that Zhang Hua panicked after their arrival and staged the incident with Teng Ping to divert suspicion. When Zhang Hua accuses him of making false accusations, Yun Hongshen reveals himself as the witness who saw Zhang Hua poison Teng Ping’s dagger. He explains that Zhang Hua, jealous of his partnership with Wen Yeming, instigated the fight with Teng Ping, hoping one of them would die.
Zhang Hua applauds Yun Hongshen’s deduction but declares no one will hear it. He attacks Yun Hongshen, and a fight ensues. Ke Jingping sends reinforcements led by Ling Han. Zhang Hua takes Ling Han hostage. A sniper in hiding shoots Zhang Hua dead. Ling Han berates the sniper, as capturing Zhang Hua alive would have been more valuable. Back at the military statistics bureau, Ke Jingping is furious that the lead is dead, hindering their progress. Yun Hongshen recalls Zhang Hua mentioning meeting his superior and suggests investigating everyone he has recently met.
At home, Yun Hongqi informs Yun Hongshen about his investigation into Li Miaohan, revealing her frequent contact with Xu Heng and Zong Fang. During dinner with Milan, she invites Jingyu to the cinema. Jingyu asks Yun Hongqi to go instead, and Old Mrs. Yun subtly encourages Yun Hongshen to accompany Milan. The three go to the cinema to watch a film starring Li Miaohan. After the movie, Milan praises Li Miaohan’s performance. Yun Hongshen abruptly excuses himself and goes to Wen Yeming’s home, informing her that Li Miaohan may be Chuanqi’s lover. Zong Fang looks at a photo of himself with Zhang Hua, reminiscing about their friendship.
