Ma Yan didn't come home very late, and Ma Kui was worried. Wang Sufang lied that Ma Yan had gone to play with her classmates. Ma Kui didn't believe it at all, and suspected that she had gone to see Wang Xin. Ma Yan braved the heavy snow to go home. Ma Kui asked her hard about her whereabouts. Ma Yan made random excuses to cover up. Wang Sufang protected her from the side. Ma Kui was so angry that she was speechless.
Shen Xiuping came to deliver plaster to Ma Kui, casually asked about Wang Sufang's condition, and took Ma Jian back to take care of her. Wang Sufang praised Shen Xiuping in front of Ma Kui, and Ma Yan also thought Shen Xiuping was very nice, so she helped Ma Kui apply the plaster. Wang Xin received a report from the owner of a convenience store. The female customer accidentally smashed the bottle of wine at the end. Wang Xin asked the customer to pay for the wine and asked the store owner to put the wine inside to prevent the same thing from happening again. The store owner had no choice but to do so.
Shen Xiuping made a dish and delivered it. Ma Kui and Ma Yan both liked it. Wang Sufang had an idea, but she couldn't express it. Wang Xin thought the shop owner was suspicious, so he disguised himself and came to the shop to investigate. He accidentally knocked the wine to the ground. The shop owner hurried over and asked him to compensate. Wang Xin revealed his identity, and the shop owner was so frightened that he begged for mercy. He admitted that he had set up a trap and just pulled the button in his hand. Rope, the bottle of wine on the edge fell to the ground, and the bottle was filled with water.
Director Yang learned that Wang Xin had exposed the shopkeeper's scam and was full of praise for him. Wang Xin heard from Director Yang that Ma Kui was injured while catching the gangster, and he immediately asked for leave and came back to visit Ma Kui. Wang Xin greeted Ma Kui with greetings, but Ma Kui didn't appreciate it and sent him away with a few words. Before leaving, Wang Xin left a large box of plasters for Ma Kui, which made Ma Kui feel warm.
Ma Kui gradually recovered and he quickly returned to work. Xiao Hu confessed to him that he had escaped from the battle. Ma Kui saw Lu Xuelin drinking alone in the dining car, so he gave him good advice, but Lu Xuelin remained silent. When the train arrived at Haihe Station, Lu Xuelin got off the train without saying a word.
Song Chaohua sent Yuxia to the car. Yuxia wanted to go to Lu Xuelin for a showdown. Then Song Chaohua was together, and Song Chaohua reluctantly said goodbye to her. When Lu Xuelin saw this scene, he took out the nitric acid in his bag and wanted to go to Yuxia to settle the score. Ma Kui arrived in time to pull him away and found dichlorvos in his bag. Ma Kui guessed that Lu Xuelin wanted to destroy Yuxia and then commit suicide in fear of crime. Lu Xuelin complained to Ma Kui that he wanted to marry Yuxia, but suddenly received a breakup letter from Yuxia, and saw that Yuxia had a new love. He was very sad, and Ma Kui gave him a lesson. Lu Xuelin regretted it, and Ma Kui Kui promised not to pursue the case. Lu Xuelin wanted to meet Yuxia, so Ma Kui arranged for them to meet in the dining car. Yuxia and Lu Xuelin explained the truth. Lu Xuelin tore up the letter and said goodbye to the past completely.
Captain Hu received a notice from his superiors to investigate an opium smuggling case in Yunnan. The person involved had a Northeastern accent. Captain Hu reminded the police officers to be more vigilant to prevent drug traffickers from using the railway to transport drugs. Wang Xin was patrolling the small square when Ma Kui suddenly came to see him. Wang Xin was very happy. Ma Kui conveyed the instructions of his superiors to Director Yang and praised Wang Xin in front of him, but Ma Kui exposed Wang Xin's old background and embarrassing things in front of him. , Wang Xin was so embarrassed that he had to find an excuse to leave. Ma Kui admired Wang Xin very much and asked Director Yang to train Wang Xin well. Director Yang was very envious of Ma Kui for having such a good apprentice as Wang Xin. Ma Kui finished his work and left Hongyang. Before leaving, he gave Wang Xinqian many instructions.
The New Year is approaching, and every household is decorated with lanterns and colorful decorations. Shen Xiuping writes Spring Festival couplets for each household, which is deeply loved by her neighbors. Wang Yongge personally cooked the New Year's goods and asked Wang Xin to deliver them to Ma Kui's family. Ma Yan happened to come to deliver dumplings to Wang Xin's family, and the two exchanged words.
Yao Yuling's house suddenly caught fire. She shouted for help. Wang Xin, Ma Yan and others hurried upstairs to put out the fire. Niu Dali rushed in and took out the oil can, but was burned, but he did not regret it. Shen Xiuping bandaged his wound. Yao Yuling Send Niu Dali a New Year’s Eve dinner.