Episode 13 recap: Twins' Secret Exposed.

Guan Xue left, the special agent was inside, and Song Zhuo Wen handed the address to Qian Chong Li. Qian Chong Li hurriedly took the proof given to him and went upstairs. Inside, someone called Guan Xue to verify, but Qian Chong Li had no choice but to shoot and damage the electrical box, then took the opportunity to break in and rescue the injured Xiao Zhao.

Guan Xue realized something was wrong and immediately returned. Along the way, she was so anxious that she almost grabbed the driver's steering wheel. However, it was already too late; the person had been rescued. Pan Yue and Hu Bin looked helpless. The spy took the opportunity to escape while Xiao Wei was unconscious, which surprised Song Zhuo Wu when he saw the fainting Xiao Wei on the road.

Guan Xue was in the office, smashing things and throwing a tantrum. Pan Yue quickly went to find Song Zhuo Wen to go in and persuade her. Only he could handle this situation. The office phone rang, and the spy sounded panicked, claiming to be an associate of "Squirrel," begging for immediate help. However, before the words could fully sink in, Song Zhuo Wu arrived and shot and killed the spy, then quickly left. On the other end of the phone, Pan Yue began to suspect Song Zhuo Wen because the spy mentioned someone resembling "Pu Ke" approaching him.

After tracing the call's source, Song Zhuo Wen, Guan Xue, and Pan Yue rushed to investigate. Song Zhuo Wu had originally intended to leave, but the transportation route was destroyed, so he had no choice but to return. Qian Chong Li breathed a sigh of relief, but he believed that shooting the spy was the right thing to do.

The most important task for the Communist Party at the moment was obtaining penicillin, so they tightened control within the city, investigating the buying and selling of penicillin. People resembling "Pu Ke" were also taken away. To acquire penicillin, Song Zhuo Wen deliberately took a hard fall, injuring his arm, and then obtained the penicillin for Qian Chong Li. Qian Chong Li asked him to go and check on Song Zhuo Wu.

Song Zhuo Wu saw how severe Song Zhuo Wen's injuries were and became very worried. He scolded him for being foolish. Qian Chong Li learned that there was a mole on the mountain, and all the details about this person were provided by Song Zhuo Wen. He suspected that the spy was an accountant, and he even knew the material of the wooden desk they used.

These details must be reported intact to Commissar Fang, but it wouldn't be easy for our comrades who were injured to leave Harbin. Guan Xue was in a bad mood, so Song Zhuo Wen proposed taking her out for a stroll. The two of them planned to leave the city but encountered strict checkpoints. After some probing from Song Zhuo Wen, Guan Xue was satisfied.

Seeing how dedicated he was to his work, Guan Xue was pleased and specially rewarded them. Song Zhuo Wen and Guan Xue left in a car, and afterward, Song Zhuo Wu disguised the injured patient as Guan Xue and left the checkpoint once again. Cui Anping didn't investigate but let them pass. However, due to the short time interval, he realized that something was amiss and seemed to have guessed what was going on.

That night, Cui Anping boasted about this incident and even described Song Zhuo Wen's appearance, urging them to be more vigilant. The two cars were only a few minutes apart, and Cui Anping secretly confirmed his suspicions. They planned to switch cars and take the person out of the city. He even suspected that the drivers of the two cars were twins. Cui Anping fantasized about having leverage over others and getting rich, but he didn't know what awaited him.