Episode 19 recap: Cheng Fan became a suspect.

25 years ago, Mu Shaobai was in the hospital when Gu Mulan came with people, claiming to have been shot. Mu Shaobai treated Gu Mulan's injury, and Gu Mulan left some money. Mu Shaobai was initially going to report it to the police but hesitated because of the money. Since then, whenever Gu Mulan was injured, he would come to Mu Shaobai for treatment and give him money each time.

Later, Gu Mulan brought Mu Shaobai over and brought out a large sum of money, saying that if Mu Shaobai called him "big brother," the money would be his. Mu Shaobai brought Cheng Fan to this place, stating that if Cheng Fan wanted to marry his daughter, having a healthy body was crucial, so he asked Cheng Fan to come here for an examination.

Mu Shaobai assured Cheng Fan that if he wanted to kill him, there was no need to come here; Cheng Fan was already lying on the examination bed. Mu Shaobai connected Cheng Fan to the equipment and took out a remote control, saying that with a press of a button, Cheng Fan would die.

Mu Shaobai mentioned that there were a total of seven people in the Northwestern Wolf group and asked Cheng Fan who "Lao Liu" was. Cheng Fan suddenly understood that Mu Shaobai was "Lao Liu." Xia and his team were following behind and witnessed Cheng Fan bringing Mu Shaobai out. Mu Shaobai foamed at the mouth and was already dead. Xia called Duan Qing and informed him of the situation, stating that according to regulations, Cheng Fan should be taken back for investigation.

Duan Qing expressed his belief in Cheng Fan and allowed them to investigate freely. Director Tai also learned about the situation and reported it to Director Wang, saying that the captain he had sent out had become a suspect after landing in the morning, and the whereabouts of the undercover agent he had sent out were unknown. This was the darkest moment in his many years of being a police officer, and he would go to Kalisha now. If he couldn't resolve this matter, he would resign.

Jiang Jiuping called Xia and said he would return today, hoping to have a chat with Xia. Sha Xiaofei coerced Gu Lina's sister, asking her where the things were. Gu Lina's sister insisted she didn't know. Sha Xiaofei mentioned that their Buddha hall had his things and demanded that she return them.

Gu Lina's sister said that the Buddha hall belonged to Jiang Jiuping, and she genuinely didn't know what was there.

Sha Xiaofei called Jiang Jiuping, saying that he had his daughter in his hands and gave him an address to come to. Jiang Jiuping mentioned that he only had an old hunting rifle in his possession and could give it to Sha Xiaofei if he wanted. Sha Xiaofei stated that Jiang Jiuping knew exactly what he was talking about and asked him to come over. Duan Qing and his team were also monitoring the conversation.

Duan Qing stated that Sha Xiaofei was in an uninhabited area, with no signs of human activity within a two-kilometer radius. If anyone went there, they would be immediately discovered. Director Tai questioned Cheng Fan, who said he could tell them everything. After Cheng Fan helped Gu Mulan treat his injury, Gu Mulan grabbed hold of this leverage and threatened him, causing Cheng Fan to get deeper and deeper involved.

Mu Shaobai believed that Jiang Jiuping was not the issue. He mentioned that the Black Robe organization would threaten his family, and he hoped Cheng Fan would stop investigating further. Mu Shaobai took poison in advance, and Cheng Fan couldn't save him in time. Cheng Fan provided a recording, and further investigation is needed.

As Chu Yihan passed by a gas station, he mentioned that the car was out of fuel and needed to refuel. While paying, he discreetly handed a staff member a bill with "110" written on it. The staff member immediately called the police. The technical team informed Duan Qing that they had located Chu Yihan's signal.

Pei Laosi brought Chu Yihan and others to a building and led them inside. This was the place where the Northwestern Wolf group had previously held meetings.