#plot plot plot

Shot of new broadcast: famous entrepreneur WZH and son suspected of hiring to kill, using the Beehive and other entertainment establishments to keep and harbor escaped convicts. 27 felons have been exposed, and the Wei image is shattered.

Voiceover from the Demons: this is a day full of surprises, this day is the end of past events... and is also the beginning of future events.. it revealed some shocking truths, but also made people further perplexed...

Pei su and Du jia finish listening to the end of the chapter of Demons from the Reciters. Pei su asks what Du jia wants to do, now that Du guosheng admitted to everything and all they are waiting for is the court verdict. Du jia jokingly asks Pei su if he can't afford his large appetite anymore, and Pei su takes a look at SID and says of course, even he must mooch off of someone else for food.

Du jia grows serious and parallels trauma to drugs. Sometime he wonders why he turned out the way he is, to the point where he doesn't recognize himself anymore. He feels like an outsider to "ordinary" people, unable to achieve "ordinary people milestones". Even when the criminal has been caught, the fear, distrust, and insecurity remains. Pei su is silent but Du jia tells him he loves talking to him. Pei su replies that normally out of social courtesy, he should reply with some comforting words. But he doesn't want to say them.

Pei su tells Du jia everyone is shaped by their environment, and Du guosheng has shaped part of Du jia's flesh and blood. If it were Pei su, he would carve that piece out. He is not the one staring into the abyss; he is the abyss. Pei su gives Du jia a sinister smile.

LWZ honks his car from across the road and Pei su turns to gesture to LWZ that he will come in a moment, then tells Du jia to drive his car away. Pei su gets into LWZ's car and they go home.

Montage of scenes:

Tao ze on a date with Tang ning. They are watching a horror movie, and they hold hands after a jump scare.

After work, XHY offers to treat Lan qiao as thanks for last time (taking down WZH). They go for hotpot.

In the hospital ICU, the doctor tells Yang xi that her mother survived, but is not in good condition and that she should prepare for the worst.

Pei su standing at the window, watching LWZ leave, then makes a call.

It's night. At the graveyard, LWZ and Du ju stand in front of Huo xiao's grave. After, they go for a drink. LWZ complains and asks for a raise - it's hard making money for a family. LWZ asks Du ju to tell him more about Huo xiao. Du ju tells him that Yang zhengfeng, Huo xiao, Zhang zhaojin, and Pan yunheng were all his classmates and they were close friends. Once they began working, Yang was the most experienced. Zhang would pay for everything every time they met up (his younger brother is a rich businessman). Pan had the worst temper. Huo xiao was the youngest of the 5, and completed a masters degree during his spare time. The 327 case was the first big case Huo xiao took on after being promoted to vice team leader.

LWZ asks Du ju about what happened that night at the Seine. Du ju recalls that after they discovered Du guosheng's fingerprint, they searched for security camera footage but found none. Huo xiao never gave up. Flashback: Du ju receives a call from Yang telling him Huo xiao has died. At the morgue, the police informant Laomeizha tells them Huo xiao often faked fingerprint evidence, and would use it as an excuse for extortion.

Laomeizha was the only survivor of the Seine fire. Du ju tells LWZ that Laomeizha had worked with the police on many previous cases, and they saw him as a brother. Besides Laomeizha's testimony, Huo xiao's autopsy also showed he was in an altercation with the Seine's manager. They also found a stack of fingerprints in his home. At the scene of the crime were remnants of a notebook with Huo xiao's handwriting, which listed recent businesses Huo xiao visited. Everyone involved testified that they'd received threats from Huo xiao. At the location where Du guosheng's fingerprint was first spotted, a bartender recognized Laomeizha.

LWZ questions where the money is, if that's what Huo xiao's motive was. Du ju answers that they did find money in Huo xiao's home, along with medical results. His mother was diagnosed with cancer.

LWZ asks why Huo xiao had to act alone. Du ju goes silent. Du ju admits that if Huo xiao was wronged, then it means there is a mole in their team.

In the car, LWZ calls his father, asking for documentation of the initial Zero Degree project.

Morning, at SID. The team are holding a meeting. LWZ sums up the events of the Du guosheng case, and highlights that they will reinvestigate the Seine fire case. Some team members complain about not having new years' break. LWZ continues: ten years have passed, and all the evidence and people involved are gone. Huo xiao has no remaining family members to bother them. But if SID cannot be a place where no one cares about right and wrong.

At LWZ's apartment, Pei su steps out of the bedroom wearing a full SID uniform.

The SID team continue their briefing on the Seine case. WZH refuses to admit that the Seine was a part of his industry. There might be other people involved. "Laomeizha", real name Yin chao, had broken contact with the police and left the city for many years. Tao ze and Xiao wu leave to go find him. LWZ asks XHY to investigate some people: "greetings to shatov", and the suspicious Lunyuncheng security guard that likely switched out the security tapes twice.

Pei su arrives at the door and sees Lan qiao listening in on LWZ and XHY's conversation. Lan qiao doesn't want to be left out of their operation, so LWZ asks her to work with XHY.

LWZ takes a look at Pei su all suited up and asks what special occasion it is. Pei su jokingly mimics Lan qiao, complaining about being left out. LWZ fixes his police badge. From now on, Pei su will be a part of their team. LWZ asks Pei su to always tell him what he's doing and where he's going. Pei su replies he will advance and retreat along with the team. LWZ flicks his forehead and says SID only advances, never retreats.

Pei su shows LWZ drone footage of a man suspected to be A13. Du jia made another visit to the village at the ecological park, and found evidence of Shepherd Dog being monitored. If SID hadn't captured the Shepherd Dog, the Reciters would have killed him. LWZ points out if the Reciters' goal is to expose Huo xiao's wronging, only monitoring Shepherd Dog was not a foolproof plan. Pei su smiles at LWZ, and LWZ realizes the Reciters must have had planted people in the ecological park, the most likely one being Yizhiyan, who had the most contact with Du guosheng.

LWZ rushes off to interrogate Yizhiyan, but remembers something, and puts a pile of case documentation into Pei su's arms. He tells Pei su to bring them home and he will sort them out when he has the time. Pei su smiles watching him leave, and picks up some loose sheets that fell out. Closeup shows interrogation notes from Wang xiao and Liang yujin. Pei su seems to realize something.

LWZ and Xiao wu interrogating Yizhiyan. Yizhiyan tells them the Beehive gave him an order to poison Du guosheng, but "they" asked him to keep Du guosheng alive, and in return "they" will send him somewhere safe. Yizhiyan confesses he only knows one person from that organization, A13, and confirms it is the man in the drone footage.

Pei su is waiting for LWZ outside the interrogation room. Pei su points out that the day Wang xiao overheard Liang yujin and her friends talking about WWC's birthday party, Liang yujin was not actually at school. But Liang yujin confirmed what Wang xiao overheard was true.

Pei su and LWZ head to Yufen to look at security camera footage. On that day, a janitor had followed Wang xiao into the bathroom. The janitor was carrying a high quality voice recording and audio playing device. What Wang xiao overheard in the bathroom was just an audio recording.

The security guard at Yufen is startled - he does not recognize this janitor as staff. LWZ texts XHY for him to also investigate the janitor.

Tao ze and Xiao wu arrive out of town to find the whereabouts of Yin chao. A local policeman, Kong weichen, greets them. They go and visit Yin chao's twin brother, Yin ping, who is reluctant to let them into his home.