In 1958, the whole country was in dire straits, and the "Water Drop Project" on the theoretical basic research on nuclear submarines reached its most critical moment. An Wenshan, a patriotic scholar living abroad, was an expert in nuclear technology. He wanted to return to the country to serve, but was unexpectedly killed by enemy agents on his return. Regarding molecular control, he handed the research data to Ji Danyang, a Ph.D. in mathematics, and asked Ji Danyang to take it back home. Taiwan's military intelligence department received the news and sent a special operations team to Hong Kong to intercept Ji Danyang.
The Ministry of Public Security sent capable police officers to Hong Kong to escort Ji Danyang back to China, codenamed "Operation Magpie Bridge". The public security officers took the Wilson cruise ship to Hong Kong and would arrive at their destination in thirty minutes. They were ready. The cruise ship arrived at the port. As soon as Ji Danyang stepped out of the cabin, he saw a man wearing a navy blue peaked cap holding his name tag. Ji Danyang clearly remembered that An Wenshan said that the man who came to pick him up was wearing a black peaked cap. He realized that the situation was different. Miao, walked past the man calmly, and the man suddenly called out his name. Ji Danyang refused to admit that he was the one he was waiting for.
Ji Danyang saw the man standing not far away who was holding his name tag and wearing a black peaked cap to meet him. Just as he was about to step forward to recognize him, an ambulance came speeding towards him. The people in the car got down and wanted to contact Ji Danyang. He was taken away, and the comrade who came to join him fired in a hurry. The two sides started a fierce battle, and the street suddenly became chaotic. People were frightened and fled for their lives. Ji Danyang took advantage of the chaos and left. Because the first contact failed, Ji Danyang decided to go to the hotel lobby for the second contact as instructed by An Wenshan. He arrived at the hotel lobby before 8:30 with the information. The person who came to contact him was a woman. She accurately told the password for the contact. , and also reminded Ji Danyang in a low voice to pay attention to safety. There were many spies ambushing the hotel. Ji Danyang also felt that dangers were lurking, and he had no doubts about that woman.
Pang Hongmei, a police officer from the Ministry of Public Security, took the initiative to invite Ji Danyang to dance. The woman pulled Ji Danyang onto the dance floor without saying a word. She tried to take him out of the hotel unprepared, but was blocked by Pang Hongmei. Pang Hongmei introduced herself that she was ordered to pick up Ji Danyang. As a contact person, a gun was held to the back, and the woman took the opportunity to escape with Ji Danyang.
Pang Hongmei knocked out the enemy agents who threatened her, and then went after Ji Danyang, but it was too late. The woman took Ji Danyang to room 606. She pretended to have missed and spilled a glass of water on Ji Danyang's briefcase. The notebook inside fell to the ground, and the woman picked up the notebook and looked through it carefully. Ji Danyang immediately became alert. An Wenshan repeatedly told him not to hand over the information to anyone before setting foot on the country. The woman discovered that there was no information in the notebook and asked Ji Danyang to hand over the information. Ji Danyang had to admit that he had put the information in the room. , the woman asked him for the room key and left.
Ji Danyang saw that the woman had been deceived, and he wanted to take the opportunity to escape. Pang Hongmei, who was dressed as a hotel waiter, caught him on the spot. Pang Hongmei repeatedly explained that the outsiders who came to the dock to connect were accidentally exposed. The woman just now was a Taiwanese spy. Ji Danyang was confused to begin with, and now he was even more confused. Pang Hongmei vowed to protect him and the information he brought with her life.
The female agent got the information and returned to 606. She found that Ji Danyang was missing. She immediately summoned her accomplices to search around. Pang Hongmei and the female agent met again. The female agent threatened Ji Danyang with a gun on his head. Pang Hongmei had to put down the gun and Ji Danyang Suddenly he understood that Pang Hongmei was the one who came to contact him. He kicked the gun to Pang Hongmei. The female agent shot and injured Pang Hongmei. Pang Hongmei covered Ji Danyang's escape.
It started pouring rain, and Ji Danyang ran far away in one breath. He recounted what had just happened from the beginning. Pang Hongmei then found him and took him to the temporary settlement site. Ji Danyang helped Pang Hongmei bandage his wounds, and Pang Hongmei persuaded him Don't worry, try to find a way to get the information back. The notebook Ji Danyang gave to the female spy was fake. He hid An Wenshan's research data in the cabinet in the corridor in advance. Ji Danyang took the information away when he escaped. .
Pang Hongmei escorted Ji Danyang through the Luohu Gate early this morning. The whole process took thirty minutes. Minister Chu and the director of the Ministry of Public Security were waiting on the opposite side early, paying close attention to Pang Hongmei and Ji Danyang's every move. They had five minutes to pass the customs smoothly. The female spy came to the foreign detective at Luohu Port with Ji Danyang's photo and used hard and soft tactics on him. The detective ordered the gate to be closed.
Pang Hongmei and Ji Danyang passed the security check smoothly. They walked quickly to the other side. The detective ordered the gate to be closed. It was too late for the female spy to stop him. Minister Chu welcomed Ji Danyang's arrival. Ji Danyang suddenly lost his voice due to unexpected pressure. Minister Chu sent Pang Hongmei to escort Ji Danyang. When they went to Lumen, Xichuan, they arranged for others to protect them secretly.
Ji Danyang and Pang Hongmei got on the train to Lumen. Pang Hongmei temporarily kept the briefcase containing the information and followed Ji Danyang every step of the way, not allowing him to have contact with anyone.