When Gu Yizhong mentioned spring water, Zhou Zhifei pretended to be confused and asked about his identity. Gu Yizhong then revealed Zhou's relationship with Quanshui and military rule, but said that he was not interested in it. His trip was actually to purchase undersea data on Cell No. 8. After hearing this, Zhou Zhifei firmly refused and told Gu Yizhong to give up the idea.
After Gu Yizhong left, Quan Shui was eager to leave, but Zhou Zhifei dissuaded him, saying that Gu Yizhong might still be watching from the dark, and leaving at this time was not the best idea. On the other side, Gao Hu was full of gratitude for his mother's recovery. He knelt in front of Gu Yizhong and pledged his loyalty to death, willing to go through fire and water for him. Gu Yizhong quickly helped Gao Hu up, unwilling to accept this great gift. At the same time, Haimo was performing in the theater and was attacked by patriotic students. They angrily accused Haimo of being Gu Yizhong's girlfriend and a "dog man". Gu Yizhong and Gao Hu quickly intervened to protect Hai Mo and sternly warned the students that the real finger of blame should be pointed at themselves, not innocent women.
Gu Yizhong met with Haimo in private and stated that he was here to find her missing cousin-in-law. He generously gave her a sum of money, implying his desire to leave Suzhou and go to Shanghai to start a new life. Haimo was ridiculed by this sudden "reward", but with Gu Yizhong's sincere concern, he decided to continue living under the name "Haimo". Her rejection is a kind of persistence and recognition of her own identity.
As night fell, Gu Yizhong returned home and was surprised to see Haimo already at his home. Not only had he tidied up in good order, but he had also prepared dinner for him. Haimo said bluntly that since she was recognized as her daughter by Father Gu, she had the responsibility to take care of Gu's garden and prevent it from being abandoned. Although Gu Yizhong felt inconvenienced by this sudden cohabitation life, he gradually got used to the warmth.
At the same time, outside Gu Garden, Captain Zhang escorted a mysterious figure wearing a hood to the prison near Gu's house. This man was Lin Changxing, the Jiang Boxian whom Quan Shui wanted to save. In the dark cell, Lin Changxing met Xiao Junxia, another prisoner with a stubble on his face. Captain Zhang's words revealed his arrangement for the fate of the two people and the importance he attached to confidentiality.
On the other side, Xiao Ruotong made an urgent appointment with Gu Huizhong to inform her of the murder of Ding Jiansheng, and cleverly led her to think of Hu Zhiping's connection with the matter. She revealed that an underground party received a secret letter identifying Cell 8 as the mastermind, and the source of the letter may be related to Gu Yizhong. After hearing this, Gu Huizhong became suspicious and decided to mention Gu Yizhong in a tentative manner to observe Hu Zhiping's reaction and try to find clues to the truth. This series of events, like an undercurrent in the fog, quietly changes the trajectory of everyone's destiny.
Zhou Zhifei secretly met with Mr. Li and promised that his territory would be as solid as gold and would be difficult for Japanese forces to penetrate. Mr. Li made insinuations and advised Zhou Zhifei to maintain a good relationship with Kondo Masao, and revealed that Chiang Boxian's trip to Suzhou was actually a representative of Chiang Kai-shek's peace talks with Japan. Wang Jingwei wanted to prevent the achievement of his goal, but also did not want to directly anger Japan, so he set up this situation. After returning home, Zhou Zhifei confessed to Quan Shui that there was no hope of Jiang Boxian's rescue, but as long as he kept silent about the purpose of his trip, safety could still be guaranteed.
Gu Yizhong accidentally came across the name of Xiao Junxia in the archives, and was surprised to find out that this person was actually the sixth brother of the underground party, Xiao Ruotong's brother. Xie Wenchao understood Gu Yizhong's thoughts and planned the next game. He assigned Gu Yizhong to go to the dungeon to perform the escort mission. When Gu Yizhong stepped into Xiao Junxia's cell, their eyes met. Xiao Junxia immediately recognized the uninvited guest, and the atmosphere became solemn for a moment.