Episode 1 recap: Chen Jia Ping encountered Zuo Shuang Tao.

In the rainy night of 1940 in Nanjing, Zuo Shuang Tao was walking alone in the middle of the street, gradually disappearing into the distance... By daylight, Zuo Shuang Tao dressed up and began the official work with his companions, preparing to locate the target. They used taking off their hat as a signal for retreat. After briefing each other, they started to take action. Zuo Shuang Tao kept a close eye on the target suspect, not letting go of any blind spots. When the target person appeared, they had a face-to-face encounter and almost came to blows. Just as Zuo Shuang Tao was turning to leave, he accidentally bumped into the suspect with an artificial eye, and he quickly alerted his nearby comrades. Seeing the opponent becoming cautious, they began to prepare to track down the person downhill.

Suddenly, an emergency situation arose. Zuo Shuang Tao's companion accidentally dropped the suspect's photo on the ground. Just as he was about to pick it up and put it in his pocket, he was directly spotted by the other party. As the two sides quarreled, Zuo Shuang Tao could only stare blankly at his comrade being ruthlessly killed in order to not expose his own identity. At that moment, on the other side, Chen Jia Ping continued to greet the people around him as he went upstairs. When he saw the person leave, he immediately resumed a normal expression.

Zuo Shuang Tao, who failed to complete the plan, continued to secretly observe the target person's every move while touching up his makeup inside the train. After analyzing the situation with her own intelligence, she confirmed that the group of people had accomplices and became even more cautious in executing the plan, preparing to carry out the grand plan of poisoning for Xiao Hu.

After the people left, Chen Jia Ping sneaked into the room alone to eavesdrop on the situation. He quickly realized that someone was coming up, and at that moment, he had to hide behind the curtain, allowing the people inside the room to frolic. While Zuo Shuang Tao was inside the carriage arranging everything, all that was left was for the protagonist to start drinking the poisoned water. Unexpectedly, a unfamiliar young girl nearly drank it all. Seeing this disastrous scene, Zuo Shuang Tao hurriedly stepped forward to stop everything and personally covered the young girl's ears.

Chen Jia Ping, who was hiding behind the curtain, couldn't bear the intimacy between the couple in front of him and the fear of his identity being exposed. He could only silently endure everything. Soon after, everything in the room was disrupted by Chief Mukai.

Unexpectedly, on the other side, Zuo Shuang Tao and their team did not successfully complete their mission, partly due to an insufficient dosage of poison. Upon learning of this, they continued to meticulously plan and prepare to successfully retrieve the secret message.

When Chief Mukai entered the room, he accidentally discovered the woman hiding behind the curtain and immediately sent her away. Before leaving, he also revealed the news of his own people being poisoned, thus suspecting the presence of a mole within the trading firm. At that moment, Chen Jia Ping, who was hiding in the room, seemed to hear some reliable information and immediately ran to the scene to observe the situation.

When the train came to a stop, the injured person on the train was carried off by medical personnel. Seizing the opportunity, Zuo Shuang Tao hurriedly quickened her pace. The scene soon descended into chaos. Seeing her companion injured and her own identity exposed, she had no choice but to flee the scene. Along the way, she discarded her outer garments. By a stroke of fate, she happened to come face-to-face with her former acquaintance, Chen Jia Ping, right in the middle of the road.

Staring at the familiar woman in front of him, Chen Jia Ping was momentarily stunned but quickly began to help her provide cover. After clearing their suspicion, the two continued moving forward, only to be mistaken as suspects by others on the road and taken back for interrogation.