Zhang Ashui resolutely refused to disclose any information. He relied on the intelligence he had and imagined that his superiors would send someone to rescue him.Zhang Yan found out that Taiwan's intelligence agency had formulated a rock plan for the Water Drop Project, and the mastermind behind it was her old rival Kou Xuesong.Bai Hui came to give Zhang Ah Shui an infusion, and Zhang Ah Shui recognized her as Bai Minghan's daughter.He kept claiming that Bai Minghan had saved many people, both good and bad, and specifically asked Bai Hui to ask Bai Minghan if he knew Xu Wenzheng.Xu Wenzheng was a latent agent of the Kuomintang, codenamed “ Snow Leopard ”, and was executed in 1953.

Hongmei found Xu Wenzheng's information and found that Bai Minghan had gone to the prison to treat Xu Wenzheng, but there were no other abnormalities.However, Pang Hongmei still has doubts about Bai Minghan, while Chen Dongsheng believes that Bai Minghan has no problem, otherwise he will get rid of Zhang Ashui during treatment.Pang Hongmei learned about the grudge between Kou Xuesong and Zhang Yan from Lao Jiang in the archives.In 1947, Zhang Yan was sent to Zhangjiakou to establish a liaison station, but was destroyed by Kou Xuesong's agents who had been ambushing her for three years.Zhang Yan holds a grudge against Kou Xuesong.Kou Xuesong learned that Zhang Ashui had the meeting minutes of the Water Drop Project in his hands. He was also worried that the identities of agents such as Li Guangming and Gecko would be exposed, so he ordered Xue Lang to get rid of Zhang Ashui as soon as possible to ensure the safety of the agents.

Kou Xuesong learned that Chinese medicine doctor Xu Wenzheng's agent Bai Minghan, codenamed “ Ghost Owl ”, made Zhang Ashui wake up. He wanted to use Bai Minghan, but he was worried that he would be incited to rebel, so he sent someone to test him.Ji Danyang received a threatening letter pieced together from newspapers, requiring him to go to the telephone pole outside the department store at 4 o'clock tomorrow afternoon to hand over the nuclear submarine information compiled by An Wenshan, otherwise An Wenshan would be in danger of his life.Ji Danyang was so frightened that his whole body became cold.When Lai Guangrun went to Bai Minghan for a massage, he inadvertently mentioned that he brought precision instruments to the instrument factory. Bai Minghan found a secret letter in the book.After Ji Danyang received the threatening letter, he felt restless every day and often made mistakes. He Xiwen thought he was too tired and advised him to rest, but Ji Danyang could not explain the reason clearly.Xue Lang gave Li Guangming a secret instruction, asking him to get rid of Zhang Ashui before 7:30 pm.Zhang Ashui asked Li Guangming to tell Xue Lang that if he was not rescued within three days, he would explain everything.

Both Chen Dongsheng and Pang Hongmei noticed Ji Danyang's unusualness, but he said nothing. Pang Hongmei secretly observed Ji Danyang's every move, and Ji Danyang was very wary of her.When Bai Hui came home from get off work, she asked Bai Minghan about Xu Wenzheng. Bai Minghan guessed what Zhang Ashui said and advised Bai Hui not to believe the rumors. He said that it was his duty to treat diseases and save people, and he did not care about the identity of the patient.Bai Hui didn't ask any more questions.The scheduled time was about to come. When Pang Hongmei left in a hurry, Ji Danyang asked the police officer on duty to accompany him to the construction site. He lied that he was going to a bookstore and asked the police officer to stop halfway. Pang Hongmei followed quietly in his car.Chen Dongsheng severely interrogated Zhang Ashui, but Zhang Ashui refused to reveal the identities of Snow Wolf and Gecko. He still believed that his superiors would send someone to rescue him.

Ji Danyang walked out of the bookstore, cleverly avoided the police's protection, and came to the telephone pole outside the department store.Pang Hongmei followed closely behind, watching him from a distance.A child threw a paper airplane at Ji Danyang's feet, and he quickly picked it up. It said on it that he would be at the post office phone booth at five o'clock.Ji Danyang rushed to the post office without saying much. Pang Hongmei followed him and asked the police officer who was traveling with him to find the child and learn about the situation.

At five o'clock on time, the phone rang. Ji Danyang hurriedly picked it up and left in a hurry. Pang Hongmei asked the police officer to find out where the call came from. She followed closely to the library.Ji Danyang pulled out a note from a book, and Pang Hongmei saw the whole process.Ji Danyang came to the riverside and waited for a long time without seeing anyone. Pang Hongmei hid aside and watched him.Lai Guangrun sent a batch of precision equipment to the instrument factory. He took the initiative to help the workers carry it and accidentally injured his foot.Ge Yun bandaged his wounds and found that his foot bones were cracked and he needed to rest for three months.

Lu Cheng tried his best to please Bai Hui and specially brought this year's new tea to Bai Minghan, but Bai Hui politely declined.Zhang Ashui threatened to kill Bai Minghan and asked Bai Hui to tell him.Because Lai Guangrun was injured and had difficulty moving, the nurse helped him get medicine and let him rest in the corridor. He found Li Guangming taking a walk outside the ward.Bai Hui went to measure Zhang Ah Shui's blood pressure and took the opportunity to kill him. Suddenly the whole hospital fell into darkness, and Bai Hui was so frightened that she hurriedly hid.Chen Dongsheng and the police officers came after hearing the news and sealed the hospital. When Chen Dongsheng arrived in the ward, he found that Zhang Ashui had been killed. He saw Bai Hui trembling behind the screen.Bai Hui heard that someone entered Zhang Ashui's ward and forced him to reveal the hiding place of the information. However, Zhang Ashui refused to explain, so the man killed him. The room was dark, and Bai Hui could not see who the person was.