Episode 5 recap: Su Xing and Luo Guan Ying had a direct confrontation.

Zhou Ya Ming reminded Su Xing that he had entered the Tong family residence multiple times, attracting the attention of the secret police, so this time when he went to meet Tong Jiang Nan, he must be extra vigilant for his safety. Regarding Zhou Ya Ming's concerns, Wang Da Long said he would still follow the old routine - Su Xing would be responsible for meeting Tong Jiang Nan, and he would provide backup and protect the safety of both, not allowing the Kuomintang secret police any opportunity.

Now Hong Kong has been infiltrated by the Kuomintang and has become very unsafe. Tong Jiang Nan and the gathered experts were discussing how to leave Hong Kong. When Li Ru Chen was around, he could still help them contact merchant ships, but now that has become a problem. Luo Guan Ying had a new plan - to have the Communist Party thoroughly defeat the Tong family, so that Tong Jiang Nan would truly believe in him.

The successive murders of old friends deeply saddened Tong Jiang Nan and made him extremely angry at the Kuomintang's insanity. His cousin Han Yu Rong urged Tong Jiang Nan to stay away from the conflict, but Tong Jiang Nan believed that one must have a country in order to have a home, and Zhu Zhe and Li Ru Chen died for their cause.

At this time, Tong Sheng returned from outside, his emotions clearly quite poor. Han Yu Rong revealed to Tong Jiang Nan that Tong Sheng was very likely to have contacted Su Xing. Later, Han Yu Rong came to the room to check on Tong Sheng, reminding her that she should consider her marriage matters early, and felt that Zhang Shao Mu was a trustworthy young man. But Tong Sheng clearly had no interest in Zhang Shao Mu, and used the excuse of needing to do experiments the next day to get Han Yu Rong to leave.

The next day, after attending Li Ru Chen's memorial service, Tong Jiang Nan and the others returned to discuss countermeasures. Someone suggested directly going north by land, but Tong Jiang Nan, remembering Zhu Zhe's prior warning, told everyone this method could not guarantee safety. Outside the Tong family villa, Wang Da Long went to a stall to contact an underground party comrade to gather intelligence, reminding them to report any movements immediately.

Later, Tong Jiang Nan came to the lab and reprimanded Zhang Shao Mu for telling Han Yu Rong about Su Xing's situation. Su Xing could only lie and claim he had accidentally let it slip. Because of this, Tong Jiang Nan found Tong Sheng, believing that since Su Xing's true identity was unclear, whether he was with the Kuomintang or the Communist Party, they should minimize contact with him.

After Tong Jiang Nan left, Tong Sheng sat alone in the courtyard, lost in thought. The words Su Xing had once said raced through her mind, leaving her deeply disturbed. Zhang Shaomu observed Tong Sheng's every move, wanting to go comfort her, but was stopped by Chen Xuewei on the pretext of checking experimental results.

In the office, Chen Xuewei discovered Tong Sheng backing up experimental data, but Tong Sheng did not admit to it. Since Tong Jiang Nan was unable to determine Su Xing's identity, he called the Guanghua Hotel where Su Xing was staying, deciding to host a family dinner to observe him further.

Due to Su Xing's frequent visits to the Tong family, which had drawn the attention of the secret service, Zhou Yaming reminded him to be extra cautious. Facing Zhou Yaming's concerns, Wang Dalong stated that according to the old rules, Su Xing would be responsible for meeting with Tong Jiang Nan, while he would be in charge of providing backup and ensuring Su Xing's safety. When Dang Xunqi received a report that Su Xing had gone to the Tong family, and Luo Guanying happened to be nearby, he decided to go to the Tong family to meet Su Xing, vowing to let the Communist Party suffer a disastrous defeat at the Tong family.

Tong Jiang Nan inquired about the situation in the mainland and Su Xing's relationship with Tu Zhe. Su Xing answered truthfully, stating that he had never met Tu Zhe in person and had only maintained contact through special means. Just as Tong Jiang Nan and Su Xing were about to sit down, Luo Guanying unexpectedly showed up uninvited.

At the dinner table, Luo Guanying first deliberately revealed that he had seen Su Xing within the Nationalist Party, then openly declared himself to be a member of the Communist Party. During the verbal exchange, Su Xing still did not reveal his true identity, maintaining a certain reserve, and even interrogated Luo Guanying about the Communist Party, to which Luo Guanying refused to answer, citing confidentiality.

After the third round of drinks, Su Xing prepared to leave. Before departing, he reminded Tong Jiang Nan that the Nationalist Party and the British government were both keeping a close eye on him, and as long as he did not make a decision, no one could do anything to him. He advised Tong Jiang Nan to wait a little longer, as everything would eventually become clear.

Tong Sheng took the opportunity to escort Su Xing out and again asked about his true identity. Su Xing revealed his identity and expressed his true intentions, which increased Tong Sheng's trust in him. However, upon learning that Su Xing had left the Tong family, Dang Xunqi ordered a female sniper to eliminate him.

Meanwhile, Luo Guanying deliberately fabricated the rumor that Su Xing was a Nationalist Party spy, hoping to convince Tong Jiang Nan, who remained hesitant. However, Han Yurong was deeply concerned, fearing that Tong Jiang Nan might get into trouble.