Tong Sheng returned home after completing her laboratory work and found that her father was in a bad mood due to a visitor at home.On the other side, Su Xing revealed to Zhou Yaming the reason for the breakdown of his relationship with Tong Jiangnan's master and apprentice.At Shanghai Aurora University, Su Xing met and fell in love with Tong Sheng. However, because he was responsible for the organization's latent mission, he had to reluctantly break up, and he lost Tong Jiangnan's trust.Originally, Su Xing hoped to take this opportunity to eliminate past misunderstandings, but the situation was far more complicated than expected.

Su Xing speculated that Tu Zhe's murder was an attempt by the enemy to cut off their connection with Tong Jiangnan. If he could capture the murderer, he could prove his identity.Now that there was only half a month left before the organization planned to evacuate, Su Xing knew that there could be no further delay, so he immediately took people to Tu Zhe's residence and carefully surveyed the scene to collect clues.Coincidentally, Su Xing met the shrimp boy he rescued before again, and unexpectedly learned that he was Tu Zhe's adopted godson.Xiazai understood the purpose of Su Xing and others' coming and told them everything he saw.On the day of the incident, Tu Zhe planned to buy a new pair of cloth shoes for Xiazai and told him to come home to pick up the shoes in the evening. Unfortunately, Tu Zhe encountered misfortune before the shoes were handed over to Xiazai.Xiazai revealed that the murderer smelled of roasted goose, which was an extremely important clue for Su Xing.In order to ensure the safety of the contact station, Su Xing did not take Xiazai to see Zhou Yaming. Instead, he waited until the next day, took Xiaojing and Zhou Yaming to the slums, and drew a portrait of Fatty based on Xiazai's description.At the same time, A Biao and others continued to squat across from Tong's house to monitor. Dang Xunqi and Luo Guanying came to inquire about the situation and learned that someone from Haijiang University came to visit.

Although the investigation of the case progressed slowly, Li Wenbo had new speculations. He suspected that Tu Zhe's death was intricately linked to the Kuomintang.At this time, democrats gathered in the Tong family. Tong Jiangnan revealed to everyone that Tu Zhe was most likely the liaison person and that the Kuomintang forces had penetrated into Hong Kong.In addition, Tong Jiangnan also mentioned the affairs of Luo Guanying and others. He believed that until the identities of the two are unknown, they can only wait and see what happens.The democrats present were worried about their own safety, and their internal opinions were divided: one party advocated temporarily shelving the plan to go north, while the other insisted that they should return home immediately.Li Ruchen said that he can contact friends in the mainland and help everyone leave Hong Kong via cargo ships.On the other hand, Xiaojing found Wang Dalong at the dock and took him to see Su Xing.Friends who had not seen each other for many years were very happy to reunite. Zhou Yaming emphasized the importance of this mission to Wang Dalong and reminded him to fully cooperate with Su Xing's actions in Hong Kong to ensure his safety.

Li Wenbo and Zha Liangjie came to Tong's house and vaguely reminded Tong Jiangnan to be careful about the Kuomintang, which made Tong Jiangnan and others face a complicated dilemma. The Kuomintang's assassination of Tu Zhe made the situation even more confusing.At the same time, the British Hong Kong government also began to take notice of their actions.This series of changes made them feel difficult.Su Xing and others divided into several groups, took Fatty's portrait, and searched carefully in the streets and alleys. Even Shrimp Boy mobilized his friends to take active action.After Zha Liangjie followed Li Wenbo back to the police station, he began to analyze the murder case of Tu Zhe in depth. He observed that Tong Jiangnan's behavior in the case was quite abnormal, and speculated that Tong Jiangnan might have something to hide.Li Wenbo agreed with Zha Liangjie's speculation and believed that they might have overlooked some important links during the investigation, and decided to shift the focus of the investigation to the Kuomintang.

The experiments by Tong Sheng and others are still in progress. Due to time constraints, they have not yet mastered everything, which makes Tong Jiangnan feel even more anxious.Tong Jiangnan told Tong Sheng to try his best to complete this project in Hong Kong, otherwise it would be too late to reach the mainland. Moreover, once the experiment is successful, it will greatly improve the thermal energy efficiency of oil, which will be of great significance to the industrialization process of New China.Tong Sheng understood her father's anxiety, but she was also worried that the British Hong Kong government would prevent them from taking away the experimental results.For this reason, Tong Jiangnan reminded her daughter to back up her data just in case.While the two were discussing, Anne, the assistant to the Governor of Hong Kong, suddenly visited the school and provided Tong Jiangnan with 50,000 pounds of funding approved by the British government to support their research, but the premise was that both Tong Jiangnan and the research results must stay in Hong Kong.