Episode 16 recap: Cheng Bing and Pan Da Hai got into an argument.

People here are talking about the case of Wang Da Yong, saying they heard that they beat someone to death in the interrogation room back then. Lin Ying is also unhappy, saying that the person was already injured when they arrived, and it's just a case of rumors being spread. The people here received a phone call and were very happy, considering Pan Da Hai as a lucky star because he caught the person as soon as he arrived.

Zhang Shuqiao's younger brother said that Gu Erqiang killed the person while trying to snatch the materials. Cheng Bing came back and mentioned this matter, but they still don't know if the person who died is Wang Da Yong. Lao Ma thinks that if it is Wang Da Yong, they should be happy because then they can live their own lives.

Shi Tou thinks that it's still not clear and they need to investigate further. Lao Liao says he can't continue to investigate with them because his wife was burned and has been refusing to go to the hospital. Now she's infected and in a coma, so he must go back to take care of her. Cheng Bing and the others tell Lao Liao to go back quickly, as they still have things to handle here.

Now the identity of the deceased has been clarified, and it's not Wang Da Yong. However, Cheng Bing comes over to tell them that the person who died is indeed Wang Da Yong and asks everyone to go back quickly. Cheng Bing buys them train tickets and says he will leave first because he must catch Wang Da Yong but doesn't want to involve everyone.

Lao Ma and the others try to call Cheng Bing, but his phone is switched off. They decide to have a meal at a food stall. Shi Tou has already sold his car and decides not to go back but stay here with the real estate agent girl. Cheng Bing arrives in the northeast, and now there's a shooting case in Xi'an. The gun used is the same one that belonged to Wang Da Yong back then. Cheng Bing quickly brings Lin Ying to Xi'an.

People in Xi'an are discussing the Wang Da Yong case, saying they heard that they killed someone in the interrogation room back then.

Lin Ying is also discontented, saying that the person was already injured when they arrived, and it's just a case of spreading rumors. The people here received a phone call and were very happy, considering Pan Da Hai as a lucky star because he caught the person as soon as he arrived.

Pan Da Hai came over to interrogate, but this person is not Wang Da Yong. This person confessed that the gun was stolen by himself from a bathhouse in the northeast, where he used to work. He knew that the locks there were easy to open, so he stole many people's belongings. After returning, he discovered the gun but didn't dare to throw it away, so he kept it.

Pan Da Hai presented the photos from Jiecheng, and the person had to admit that he killed someone. He saw the news on the stolen cell phone and unexpectedly learned that a seemingly ordinary stone owned by Shi Tou could be sold for millions. So he contacted that person and brought Shi Tou along. They were originally going to make a deal, but suddenly in the car, that person tried to strangle him. In panic, he shot and killed him. He initially planned to hide the body, but the car broke down on the road and fell into the river. He managed to escape after great difficulty.

Pan Da Hai suspected that he might not be telling the truth and sent someone to Jiecheng to see if they could retrieve the original stone from the river. Pan Da Hai and his team came to investigate in the northeast, and Cheng Bing was also there. The owner of the bathhouse has already passed away, and the current owner has no knowledge of this matter.

Cheng Bing also arrived at the bathhouse to investigate and learned that the previous owner was named Liu Danan. He had gambled and lost money, so he mortgaged the bathhouse. Cheng Bing went to Liu Danan's hometown to investigate, but even Liu Danan's relatives didn't know where he was now. Pan Da Hai and his team also came to inquire and found out that Cheng Bing was also investigating. Pan Da Hai went to the hotel to find Cheng Bing.

They asked when they arrived and invited them to have a meal. Pan Da Hai and Cheng Bing had dinner together and talked about many past events, feeling deeply moved. Pan Da Hai asked Cheng Bing to stop the investigation, or else he would suspect Cheng Bing of hiding something about Wang Da Yong's case and would have to bring him back to cooperate with the investigation.

Cheng Bing and Pan Da Hai got into a fight. Cheng Bing felt that he had lost himself and needed to find his old self again.