1944, Harbin. Guan Xue, wearing a coat, was walking on the street, looking very weak and weak. She walked into a coffee shop, ordered a cup of coffee and sat down. Soon someone came to her to tell her the code. The visitor is Lao Duan, and Guan Xue is responsible for taking him out of the city. Time is running out. However, Guan Xue was very weak because she was shot in the abdomen, and the wound was bleeding continuously. Upon seeing this, Lao Duan hurriedly put her on a rickshaw. Song Zhuowen had been following the two of them from outside the cafe. Lao Duan took Guan Xue to a safe place, but accidentally saw the watch mark on her hand and immediately hid in the room vigilantly. Seeing this, Guan Xue no longer held the wound in pain, but picked up the chair and started to smash the door. The old man in the room burned the documents without any haste. Soon, Guan Xue's people rushed in to help, and Song Zhuowen also tried his best to cover Lao Duan's departure. Guan Xue and the others missed the target, but were shot by Song Zhuowen.
During his escape, Lao Duan was accidentally hit by Pan Yue's car and eventually fell into the hands of the Secret Service. However, because the intelligence was burned and nothing useful was obtained for the operation, Guan Xue lost his temper. Song Zhuowen, an underground member of the Communist Party of China, completed his mission and changed his cap to continue lurking. Guan Xue was shot in the arm, but instead of going to the hospital for treatment, she gritted her teeth and took out the bullet and bandaged it. Hu Bin brought soup to Guan Xue, but Guan Xue didn't drink a sip and warned her not to let anyone know that she was hungry today. Lao Duan was caught without saying a word, and even mocked Guan Xue severely.
Underground members of the Communist Party of China Qian Chongli and Song Zhuowen exchanged information. There was a traitor on the mountain, but Guan Xue was a talent in deceiving Lao Duan. Lao Duan was tortured, and Guan Xue coerced him into confessing his work. In order to prevent him from dying, Guan Xue and Pan Yue came up with a cruel method. They asked an acupuncturist to prick him. The pain was comparable to that caused by torture. ruthless. But Lao Duan was too seriously injured, and he died as soon as the doctor gave him an injection. Guan Xue lost her temper, but still had Doctor Shi sent home. However, Doctor Shi's identity was unusual. He got out of the car to deliver the information. Guan Xue reacted and immediately stopped the car carrying the body, and sent someone to investigate Doctor Shi.
Doctor Shi pulled Lao Duan's body back from the wilderness, desperately injected needles on the bumpy road to save his life, and also got the final information. Doctor Shi went to get the information with death determination, and asked his comrades to go to the hospital to deliver chicken soup to his wife who was about to give birth. Lao Duan's body disappeared, and at the same time he learned that his house was on fire, Guan Xue immediately led people to the train station. Doctor Shi got the information from Lao Duan's home, and then hurried to meet his comrades to deliver the news. After getting on the train, Doctor Shi was restless. Song Zhuowen, who was patrolling, gave him a signal to run! Dr. Shi ran away without saying a word. It happened that a Japanese who did not understand Chinese attracted the attention of the Secret Service Division. Dr. Shi took the opportunity to pass on the information.
Song Zhuowen helped control the Japanese, but it also reminded Guan Xue of this familiar face. She also lived in the mud a long time ago, and he saved her. Guan Xue thought she had seen her savior, tears almost overflowed from her eyes, but she still asked Song Zhuowen to get into her car with a cold voice. Although Song Zhuowen didn't know why, he still smiled and nodded.