A tragedy turns the originally carefree Guan Hongyu into a wanted suspect on the run.The twin brother Guan Hongfeng, the captain of the criminal investigation detachment, vowed to find out the truth. However, due to the principle of avoidance of relatives, the police force prohibited Guan Hongfeng from participating in the investigation of the family murder case, and Guan Hongfeng resigned in anger.Zhou Xun, who was transferred to acting detachment leader, was under pressure to solve the case. In order to track down Guan Hongyu's whereabouts, he designed the resigned Guan Hongfeng to continue to participate in the investigation of major serious cases as a “non-staff consultant”, while everyone in the police force was concealed..Suffering from “dark phobia”, “Advisor Guan Hongfeng” who appears in the police force day and night is actually played by two twin brothers in the white night. The two brothers with very different personalities are constantly making mistakes in the police force, and they are burdened with the responsibility of being surrounded by others at any time.Patrolling the dangers discovered by people from all walks of life, they solved various major and important cases along the way. The purpose was just to wait for an opportunity to read the case files of the Miemen case to find out the truth and clear their names.

Since stepping into the door of the Tianjin Public Security Bureau on February 21, 2017, Guan Hongyu has spent a full two hours.During this period, he recalled his tortuous experience from being innocently involved in the massacre of his family, from being a retired armed policeman to being a fugitive suspect, to being accepted by his twin brother Guan Hongfeng, and spending a year of alternating day and night together.

Since Guan Hongfeng suffers from phobia of the dark, Guan Hongyu pretends to be his identity to investigate the case at night.Their appearance, voice and even DNA are identical, making it difficult to tell them apart.Just as they were getting closer to the truth, the city bureau suddenly took Guan Hongfeng away.

Guan Hongyu thought about it repeatedly and believed that the only possibility of the city bureau's move was that the secret of their identity exchange had been revealed.Just when he was convinced of this guess, the Road Bureau came to the interrogation room in person, mentioned the Jinshan Group incident, and informed him that his apprentice Lin Jiayin had died in a car accident last night.

However, Guan Hongyu had confirmed that Lin Jiayin had died in an earlier police operation, so the city bureau came to him to ask what happened.He admitted that Lin Jiayin's fake death was planned by them together to allow her to continue to lurk and secretly track down Ye Fangzhou's criminal gang and its backend.But the problem is that only he and Lin Jiayin knew about this plan. Once Lin Jiayin died, no one could confirm his story.

At the same time, the Changfeng Criminal Investigation Detachment visited the bureau every week and took over a bizarre case: a male corpse was faked in the middle of the night, he died twice bizarrely, and his identity information was a mystery.After surveillance investigation and confirmation by the new forensic doctor Gao Junran, the deceased was mistakenly diagnosed as dead for the first time and sent to the morgue. He then woke up and left on his own, and died on the spot at the subway station two days later.

After handling the case, Zhou Xun inquired from the Municipal Bureau about the reason why Guan Hongfeng was taken away, and went to the Municipal Bureau under pressure to testify for Guan Hongfeng and prove his innocence.When Shi Ju learned about it, he was very angry and accused Zhou Xun of making unreasonable opinions.Zhou Xun responded with a playful smile.

On the way back, Guan Hongyu told Zhou Xun that the two brothers had gone to Changchun to find important witnesses in the investigation of Ye Fangzhou.After Liu Changyong died, Guan Hongfeng realized that Ye Fangzhou and his gang were frantically hunting down the people involved in the case and witnesses, so he urgently ordered Lin Jiayin to go to Changchun to pick up the witnesses.Now that Lin Jiayin is dead, Guan Hongyu is worried that the witness is in danger.Zhou Xun persuaded him to interview Guan Hongfeng, but Guan Hongyu was still worried about his brother framing him as a suspect.

Later, Guan Hongyu went home to question Guan Hongfeng and informed Lin Jiayin of his death.He was extremely disappointed with Guan Hongfeng, and the brotherly relationship was completely broken down.Before he left, he said that he could either be Guan Hongyu or Guan Hongfeng, who was regarded by outsiders as having superior intelligence and strong case-handling abilities.

Guan Hongyu went to Fangqiao subway station as Guan Hongfeng, and Xiao Wang reported to him his preliminary judgment: the deceased was scratched by the moving subway and hit the tunnel wall, causing bleeding in the head or internal organs.The road patrol worker said that the body was found in the tunnel last night. If an on-site inspection is carried out immediately, the entire Line 10 will need to be shut down.

Zhou Xun naturally disagreed with the suspension of the subway and demanded that the inspection be carried out according to the normal suspension time, at least until ten o'clock in the evening.Guan Hongyu ordered people to find all the surveillance cameras in the subway station first. Zhou Xun was surprised to find that this character did not resemble Guan Hongfeng. After a test, he knew it was Guan Hongyu.

On the other side, Guan Hongfeng went to see lawyer Han Bin alone, just wanting to know the real cause of Lin Jiayin's death.Han Bin revealed that the car Lin Jiayin was driving on the night she was killed was tracked by two vehicles, and she was forced to abandon the car and flee into Luhui Hutong where she was intercepted. The real murder weapon was a thin steel string.

Before Guan Hongyu was about to meet with forensic doctor Gao Junran, Zhou Xun repeatedly reminded him to be careful in his words and deeds and not to analyze the case without authorization, so as not to be spotted by a highly intelligent person like Gao Junran.However, Guan Hongyu didn't take it to heart. He used the simplest logic to speculate on the facts of the case. He even called the deceased a victim without authorization before the case was concluded.

Zhou Xun was with him the whole time, feeling uneasy and interrupting Guan Hongyu's speech from time to time, or adding details to his reasoning, trying to guide him back on track.Zhou Shutong was simple-minded and did not notice anything strange, but Gao Junran had doubts about the “Guan Hongfeng” in front of him, feeling that he was not as sharp as the rumors.Guan Hongyu's sophistry made Gao Junran waver in his judgment, and mistakenly thought that he deliberately called the deceased a victim as a test for him.

At the same time, the Yinsu Bar welcomed a mysterious man, and Liu Yin keenly noticed the blood stains on his hands and threatening words.When Liu Yin turned around, the man took out the steel string from his sleeve and tried to commit murder. Fortunately, Han Bin appeared in time to resolve the crisis and confronted the man head-on, so that he did not dare to act rashly.

The police have made no progress in investigating the tunnel. No case has been reported so far, and the identity of the deceased remains a mystery.The emergence of a subway ticket with the deceased's fingerprints brought a turning point to the case, and the search scope was locked around Fangqiao Station.Zhou Xun took the initiative to ask Ying to be responsible for the vehicle inspection work, while Guan Hongyu was responsible for the difficult task of monitoring and investigating.

Everyone worked separately and worked all night but achieved nothing.Zhou Xun knew that Guan Hongfeng was the key to solving the case, so he persuaded Guan Hongyu to contact Guan Hongfeng for help.Guan Hongyu accidentally discovered the pattern of traffic police tow trucks while buying breakfast, and thought that the deceased might have left clues due to illegal parking.Zhou Xun was overjoyed after hearing this and praised Guan Hongyu for being like an elder brother.

Following this clue, the police confirmed the identity of the deceased and learned about his family and work background.At the case analysis meeting, Guan Hongyu was in a state of confusion due to staying up late and was still in a state of confusion when he was called by the police for questioning. Fortunately, Zhou Xun rescued him.

Subsequently, the Municipal Bureau officially appointed Zhou Xun as the deputy captain of the detachment, and decided that Shi Bureau would continue to serve until the captain was appointed.Zhou Xun was grateful for Shi Ju and promised to solve the case as soon as possible.

Han Bin made an appointment with Guan Hongfeng and told him that someone had attacked him. The Liu Yin incident was just the tip of the iceberg, and the real threat was yet to come.Han Bin provided the portrait and characteristics of the Steel String Man and suggested temporarily closing the Phoneme Bar to avoid the limelight.Guan Hongfeng became extremely anxious after hearing this. He called Zhou Xun and asked him to return to the detachment, and asked him to persuade Guan Hongyu to give up.

Guan Hongyu stayed in the control room for several days, exhausted, and decided to let Guan Hongfeng come back to replace him.On the other side, Zhou Shutong and others visited and investigated the deceased's family and colleagues, and found a series of suspicious clues related to the deceased.Based on these clues, Guan Hongyu speculated that the deceased might have an interest dispute with someone, which led to two deaths.Although Zhou Xun was worried that Guan Hongyu's reckless behavior would cause trouble, he secretly cooperated with him to cover up his fingerprints.

When Guan Hongyu was about to meet with forensic doctor Gao Junran, Zhou Xun repeatedly warned him to speak as little as possible, let alone analyze the case without authorization, to avoid being spotted by a highly intelligent person like Gao Junran.However, Guan Hongyu turned a deaf ear and used the most basic logical reasoning to analyze the case. Even before the case was concluded, he called the deceased a victim.

Zhou Xun accompanied him throughout the whole process, feeling uneasy and interrupting Guan Hongyu's speech from time to time, or adding details to his reasoning.Zhou Shutong was simple-minded and did not raise any suspicion, but Gao Junran felt that Guan Hongfeng's reputation in front of him was difficult to live up to, and he became suspicious of him.Guan Hongyu's sophistry made Gao Junran even more shaken in his judgment. He mistakenly believed that calling the deceased a victim was not a slip of the tongue, but a test of him.

At the same time, the Yinsu Bar welcomed a mysterious man, and Liu Yin noticed the blood stains on his hands and threatening words.When Liu Yin turned around, the man pulled out the steel string from his sleeve and was about to commit murder. Fortunately, Han Bin appeared in time and confronted the man head-on, so that he did not dare to move rashly.

The police have made no progress in investigating the tunnel. No case has been reported so far, and the identity of the deceased remains a mystery.The emergence of a subway ticket with the deceased's fingerprints brought new clues to the case, and the search scope focused on the area around Fangqiao Station.Zhou Xun took the initiative to ask Ying to be responsible for checking the car, while Guan Hongyu was responsible for the most difficult surveillance investigation.

Everyone worked separately and worked all night but achieved nothing.Zhou Xun knew that Guan Hongfeng was the master in solving crimes, so he persuaded Guan Hongyu to call Guan Hongfeng for help.When Guan Hongyu was buying pancakes and fruit, he noticed the pattern of traffic police tow trucks on the opposite side and thought that the deceased might have left clues for illegal parking.Zhou Xun was overjoyed after hearing this and praised Guan Hongyu for being like an elder brother.

Following this clue, the police confirmed the identity of the deceased and learned about his family and work background.At the case analysis meeting, Guan Hongyu was drowsy because he stayed up late. He was still in a state of confusion when he was called by the police for questioning. Fortunately, Zhou Xun rescued him.

Subsequently, the Municipal Bureau officially appointed Zhou Xun as the deputy captain of the detachment, and decided that Shi Bureau would continue to serve until the captain was appointed.Zhou Xun was grateful to Shi Ju and promised to solve the case as soon as possible.

Han Bin made an appointment with Guan Hongfeng and told him that someone had attacked him. The Liu Yin incident was just a warning, and the real threat was yet to come.Han Bin provided the portrait and detailed characteristics of the Steel String Man, and suggested that the Phoneme Bar be temporarily closed.Guan Hongfeng became extremely anxious after hearing this. He called Zhou Xun and asked him to return to the detachment, and asked him to persuade Guan Hongyu to give up.

Guan Hongyu stayed in the control room for several days, exhausted, and decided to let Guan Hongfeng come back to replace him.On the other side, Zhou Shutong and others visited and investigated the deceased's family and colleagues, and found a series of suspicious clues related to the deceased.Based on these clues, Guan Hongyu speculated that the deceased might have an interest dispute with someone, which led to two deaths.Although Zhou Xun was worried about Guan Hongyu's reckless behavior, he secretly cooperated with him to cover up his fingerprints.

Guan Hongfeng went to Xiguan alone with a heavy heart, looking for Lu Mingjia and going to the morgue to check Lin Jiayin's body, feeling full of guilt and self-blame.At the same time, Guan Hongyu was busy doing housework at home. Seeing the childhood photos of the two brothers, he couldn't help but smile. Although he was still a little dissatisfied, family affection finally defeated resentment.

In the hospital ward, Guan Hongfeng and Zhou Xun carefully checked Gao Dong's mobile phone. From the chat records and photos, it was not difficult to see Gao Dong's deep feelings for his fiancée Zhang Yahong.However, such a beautiful relationship may become Gao Dong's motive for murder, because any man can't stand his brother's violation of his fiancée.

Faced with the questioning of Zhou Xun and Guan Hongfeng, Gao Dong finally broke down and cried bitterly, admitting that he had gone to Gao Lei to ask about Zhang Yahong's whereabouts, but Gao Lei remained tight-lipped.Gao Dong said that he had never thought about killing anyone, especially his brother. Even if Gao Lei did something wrong to Zhang Yahong, he had never thought about forcing Gao Lei to death because they were brothers born from the same roots.

Gao Dong's cry deeply touched Guan Hongfeng and reminded him of the brotherhood between himself and Guan Hongyu.Therefore, Guan Hongfeng believes that Gao Dong is definitely not the murderer. The truth should be that after Gao Lei killed Zhang Yahong, he chose to commit suicide because he was too embarrassed to face his biological brother.Zhou Xun agreed with Guan Hongfeng's judgment and noticed that Guan Hongfeng seemed to have changed a little, becoming less cold and the brotherhood made him softer.Zhou Xun persuaded Guan Hongfeng and Guan Hongyu to resolve their conflicts and not let the misunderstanding continue to spread.

Back home, Guan Hongfeng took out a box from the drawer containing physical evidence related to his case.He apologized tearfully to Guan Hongyu and confided his true thoughts, and the brothers finally settled their differences.The next day, Guan Hongyu bought two fish and put them in the fish tank, symbolizing his relationship with Guan Hongfeng.Guan Hongfeng handed the portrait that Han Bin gave him to Guan Hongyu, saying that the murderer of Lin Jiayin was probably this baby-faced man, who was good at using the steel string in his left cuff as a weapon.If one considers that the entire incident was controlled by a certain force within Changfeng's jurisdiction, then the car that hit Lin Jiayin was likely to be repaired or remodeled at an auto repair shop in Changfeng's jurisdiction.If we follow this clue, we may be able to find the whereabouts of Baby Face.

At the same time, when Zhou Xun checked the physical evidence retrieval record sheet, he discovered that Zhou Shutong returned Wu Zheng's physical evidence one day late.In order to prevent her from arousing in-depth investigation and suspicion by the Guan brothers, Zhou Xun found an excuse to transfer her to the Shannan Road Police Station.Guan Hongfeng expressed regret for this, because Zhou Shutong had always dreamed of becoming an excellent female detective.But Zhou Xun believed that doing more was better than doing less, and he did this to avoid further accidents.

After Guan Hongyu disguised himself, he visited a nearby auto repair shop for investigation, and cooperated with Guan Hongfeng to find information about Audi cars.Just when it was getting dark, Guan Hongyu received a call and learned that a new case had occurred, and he immediately rushed to the station.The Shi Bureau told everyone that a case of human traffickers abducting children occurred in Tianjin and Hong Kong. The superior leaders put pressure on the case to be solved within a time limit, otherwise it would affect the evaluation of civilized cities.Before the meeting ended, Director Shi said that he would be on duty 24 hours a day and urged everyone to be prepared to work continuously in order to recover the abducted children as soon as possible.