Episode 14 recap: Hua Zhen and Chen Hao were preparing to wait for a windfall.

When Hua Zhen heard that a Japanese person was inquiring about Meng Duozi and even mentioned the names of Luo Tianxiang and Luo Min Min, he immediately rushed out. His colleagues in the team reflexively went out to search for the person as well. Hua Zhen told his teammates that only the culprit would know Luo Min Min's name, and now they had run to her house, indicating that the visitor was not favorable. That night, the police officers from the four stations secretly stood guard at Luo Min Min's house, ready to take immediate action if anything happened.

Chen Hao had already found out the origin of the school emblem on the Japanese person. It was from a school established by the Japanese in Hongkou. After considering it for a few days, Luo Min Min solemnly told her father that she wanted to continue being a police officer. Initially, she wanted to protect her brother by becoming a police officer and drive away those who bullied their family. Now she felt that being a police officer seemed like her unfinished mission. Although her father was helpless, seeing his daughter so determined to do something with her life, he had no choice but to agree.

In the morning, Hua Zhen returned to the police station. The station chief angrily asked where they had been, and he informed them that the owner of the mahjong parlor had been mysteriously hanged the previous night, and the assistant working there had been shot to death. It was a major case. When the station chief saw that Chen Hao had also returned, he was about to ask what had happened, but his subordinates took him away. Chen Hao and Hua Zhen quickly compared the clues they had in their hands. Just then, Luo Min Min's father arrived with her.

This time, Luo Min Min's father personally escorted her back to the police station. The team members were all excited. Chen Hao went to report to the station chief about the events of the previous night. The station chief, with a newspaper covering his face, criticized Chen Hao for always getting involved in such troublesome situations instead of enjoying the good life. Suddenly, Chen Hao noticed an advertisement in the newspaper, which contained a secret signal from the underground party, asking him to meet at a designated location on that day.

Only Chen Hao and Deng Mingyuan knew this secret signal. Now, upon seeing a message summoning him for a meeting, Chen Hao became extremely excited. He quickly snatched the newspaper and rushed out, leaving the station chief bewildered. Shi Jun Yu, who met Chen Hao on the street, was the one who responded to the secret signal. After confirming the signal, Shi Jun Yu provided Chen Hao with organizational arrangements and handed him a photo. The photo depicted Tan Shiyan, the Deputy Director of the Shanghai Police Station, and a Japanese man named Rijian Naoki. Shi Jun Yu informed Chen Hao that Rijian Naoki used to be a high-ranking officer in the Japanese military and had committed many wrongdoings in China. Now, he had arrived in Shanghai with a clear special purpose.

Shi Jun Yu instructed Chen Hao to seize the opportunity to eliminate Rijian Naoki. This perfectly aligned with Chen Hao's intentions, as they had already discovered the involvement of this Japanese man in the investigation of the murder of the Meng couple. Shi Jun Yu told Chen Hao that the organization had transferred the codename previously assigned to Deng Mingyuan to him, and from now on, his codename would be "037."

Deng Mingyuan, in order to protect his comrades within the party, rejected the rescue plan. Chen Hao couldn't help but feel sad. There was a time when he and Deng Mingyuan had envisioned the future together, hoping that he could also have a codename like him. Now that he finally had one, it came at the cost of his teacher's sacrifice. Hua Zhen discussed the arrest plan for the next day with Chen Hao at the police station. They planned to keep watch near the school and, if everything went smoothly, they would immediately apprehend Rijian Naoki. After witnessing his conviction with their own eyes, Hua Zhen intended to leave the place. Chen Hao felt a bit reluctant. Through these past few days of getting to know each other, he realized that Hua Zhen was a promising talent in criminal investigation, but unfortunately, he wasn't part of their team.

Chen Hao, accompanied by police officers from the fourth station, kept watch at the Japanese school. Finally, they spotted the suspect, but he ran too fast and quickly disappeared into a large cathedral. The rooms inside were numerous, making it difficult to locate him. Luo Min Min suggested that she should stay alone to lure the Japanese man out.