Police Special Task Force Senior Inspector SANG and Traffic Police Officer CHI co-habit happily. Regional Crime Unit Inspector FUNG receives some tips about a triad organization ‘Hung Ying’ recruiting some prostitutes from the Mainland. FUNG and his colleagues set up an operation to try to catch the black-hands behind the organization, but the suspects escape. Luckily, CHI helps them to arrest them all. SANG accidentally sends RITA an animated email to propose instead of CHI. She announces the news to the whole police station. SANG loses CHI’s silver whistle during an operation. She is cross and moves out. FUNG’s wife YUEN is CHI’s boss and best friend. She tries to persuade her to get back to SANG, but fails. SANG learns that a prostitute BING has found CHI’s whistle, so he looks for her. A sect leader of Hung Ying TUNG sees BING holding the whistle and scolds her for stealing customers’ property.

CHI intercepted some illegal immigrants and is praised by YUEN and the Chief Inspector CHAN. The head of Hung Ying KUEN’s daughter WING sets up some prostitution institutes right next to TUNG’s territory. TUNG finds WING stealing his customers deliberately. KUEN orders TUNG and WING draw a borderline in the territories. TUNG objects to KUEN’s decision which protects WING. He expands his business and sends out promotion leaflets. YUEN is pregnant again. She, FUNG and their daughter SA are all waiting for the newborn. The police organize an anti-prostitution operation ‘Burning Rose’, which involves Special Task Force, Regional Crime Unit and is led by Organized Crime and Triad Superintendent KEN to fight against TUNG’s prostitution business.

CHI stops a driver who runs through a roadblock. Apparently, the driver is CHUNG, who used to be a Traffic Police Officer. SANG meets BING again during the ‘Burning Rose’ operation. He falls down and is hurt when he chases her for CHI’s whistle, while she escapes. The operation is very successful. KEN calls for a press conference. FUNG’s subordinates are annoyed that KEN only takes the credits and does not care about SANG. CHI is worried when she learns that SANG is hurt. When he presents her the whistle, she is delighted. He proposes to her, but is turned down. She wants to get married after she is promoted. A prostitute KIU tells KEN that SANG lets BING go for the whistle. KEN asks SAN for an explanation. CHI and SANG look for BING. CHUNG visits CHI and tells her that he is now working as a reporter for a pornographic website, so she asks him to help looking for BING.

CHI begs BING to tell KEN the truth about the whistle, but she refuses. BING’s neighbor steals her son’s medical subsidy. Luckily, CHI helps her to get the money back. She agrees to explain to KEN about the whistle. YUEN falls ill. She is diagnosed of a rare pregnancy disease and the doctor advises her to give up the baby. TUNG attracts the police’s attention with his high profile prostitution business. KEN decides to hold another operation to eliminate it. TUNG causes a big loss to the organization, so KUEN forces him to hand over his business to WING. He sends his subordinate TONG to kill her. Luckily, her husband CHOI saves her, but he is injured badly. She knows that it is TUNG’s plot and wants to take her revenge. KUEN advises her to gather some evidence before taking any action. YUEN notices that CHOI’s injury is not caused by normal traffic accident, so she hands over the case to the Regional Crime Unit.

FUNG analyses YUEN’s information and realizes that CHOI’s injury is caused by a potential murder case, so he watches through the recorded videos and finds out that the suspect is TUNG’s subordinate TONG and has him arrested. During a sect leaders’ meeting, WING forces TUNG to admit his murder plot, but he denies it. KUEN orders him to hand out his account book to annoy him. KUEN is thankful to CHOI for saving WING’s life. CHI finds out that YUEN is using drugs to control her condition, so she encourages her to tell FUNG about it. The Regional Crime Unit Superintendent PANG announces that KEN is the new superintendent, FUNG’s direct boss. FUNG’s subordinates TING, FA and TAI are annoyed with KEN’s working attitude. KUEN is having a birthday party when KEN’s team arrests him and TUNG for suspected involvement in a traffic accident.

YUEN blacks out suddenly. Her mother MUI and FUNG’s mother KAM try to persuade her to give up the baby, but she insists to give FUNG a son. KEN has to let KUEN and TUNG go because of lack of evidence to charge against them. Later, KEN arrests KUEN again after he finds out that KUEN’s restaurant is involved in suspected corruption. MUI learns that SANG is renovating his flat and thinks that he is going to get married. She tells the news to her daughters SZHEI and YUEN, but she finds out that is just a misunderstanding later. YUEN gives birth to her son by caesarean. KUEN falls ill in a detention centre and worries WING. CHI chases after a speeding car even after her duty. Her motorcycle suddenly dies when she speeds it up and she loses the other car. She takes it to her father HUNG’s garage for a check-up and finds out that SANG asks him to put a speed gauge into her motorcycle.

CHI stops HEI, the son of a renowned departmental storeowner, for speeding. He is shocked by her beauty. KUEN dies in the detention centre. WING inherits his leadership of the organization. HEI meets CHI again in HUNG’s wife, SUM’s pub. They chat and realize that they have similar likings. He loves her from the first sight and pursues her. He makes SANG very nervous. On KUEN’s funeral, WING and TUNG have an argument. FUNG arrives in time to settle the incident. TUNG forces WING to hand over the leadership. Meanwhile, ex-leader FOOK arrives and supports WING. SANG investigates some shoplifting cases in department stores. HEI is aggressive in pursuing CHI and bothers SANG. HUNG warns SANG to be careful that he may lose CHI.

HEI thinks that SANG is CHI’s uncle and annoys him. FUNG is promoted to Chief Inspector. YUEN finds SANG and CHI to celebrate FUNG’s promotion. KEN sets up a team to fight against Hung Ying and assigns FUNG to be the team leader. WING treats CHOI like a servant, but he puts up with her. He even puts up with her affairs. He meets HUNG in a pub and realizes that he used to be HUNG’s student. SANG sees HEI wandering in a department store during his investigation over shoplifting and thinks that he is a thief. He learns that there is some misunderstanding later. He feels stress after he hears about HEI’s background. HEI conducts a series of reforms in order to boost up the sales. He fights hard against other department stores to fight to be the sole agent of a new heater. YUEN’s daughter SA feels neglected after her little brother’s arrival.

After CHOI meets up with HUNG again, he tries to see him often. However, HUNG avoids him for not wanting to have any connection with triads. TUNG sees that football gambling is popular and takes his chance for soccer bookmaking. CHI is elected for the ‘Female Crime Fighter of the Year’ to promote the police. Her male partner is not decided yet and SANG wishes he will be elected. HEI lies to CHI that he is terminally ill to get her sympathy, but she is not fooled. She turns him down sturdily and disappoints him. The heaters that HEI’s store sell are returned by customers and causes a great loss to the company. He is scolded by his father YIP and feels enormous pressure to please him. He hurts a pedestrian when he is drunk driving. He asks YIP’s personal assistant NAM to erase all evidence and regrets for what happens.

KEN is elected for the ‘Male Crime Fighter of the Year’. SANG is only the second choice. YUEN investigates a traffic accident which involves an injured pedestrian. CHI finds out that the suspected car is the same model as HEI’s car. YUEN, CHI and an Identification Bureau officer inspect HEI’s car and the laboratory results show that his car has collision with the injured, TSUN. When YUEN is about to arrest HEI, NAM admits he was the driver that day. SA is upset because she cannot play the harmonica well. FUNG asks his subordinate HO to each her. TSUN dies and HEI gives his wife money for compensation. Identification Bureau finds HEI’s contact lens on TSUN’s body. YUEN and CHI are sure that HEI was the driver who killed him. YIP agrees to support NAM’s family if he agrees to take up the charges. The case is handed over to Regional Crime Unit as it involves TSUN’s death.

SANG teaches CHI how to act in a promotional video clip. However, CHI makes mistakes all the time. FUNG, TING and FA analyze all evidence and laboratory results and are sure that NAM is just a scapegoat. FUNG interrogates NAM and hopes he tell the truth, but fails. SA’s harmonica skill improves a lot with HO’s help. She is elected to join the school team. FUNG has a new breakthrough in TSUN’s case. He finds a bloody footprint which proves that HEI was at the crime scene. HO knows NAM from tutoring his son before. He persuades NAM to tell the truth and ease off his family’s worry. NAM admits to the police that YIP has paid him to take up the charges. HEI wants to leave Hong Kong for good. He meets CHI before he leaves. She convinces him to report to the police and admits to his charges.

HEI admits to the police that he has killed TSUN by dangerous driving. TUNG expands his power by illegal football gambling, which causes a trend in his territory. SANG is assigned to control illegal gambling, so he hands out promotional leaflets around his district. KEN takes his job seriously. CHI admires him and treats him as good friend. SANG tells CHI to keep some distance from KEN as he has an eye on her. But she scolds him for interfering with her personal life. HO loses some important document and is scolded by KEN. MUI’s staff CHUEN is chased after by TUNG’s subordinates PAU for some loan from illegal gambling. SANG has gathered enough evidence to prove that PAU is involved in illegal bookmaking. However, SANG aims to find the bookmaker. TUNG’s subordinates TAN and KAI beat up PAU because he does not give TUNG all the money from the bets. Some loan sharks mess up MUI’s restaurant when they try to find CHUEN.

MUI and SZHEI are scared by the loan sharks. FUNG investigates the case and realizes that they are after CHUEN’s loan. KEN and CHI meet up to discuss about the promotional film. KEN’s girlfriend SANDY gets jealous and humiliates CHI in public. SANG and his subordinate KAT bump into CHI when they are having dinner. She thinks that he is following her and gets furious. SANG expresses his worry of losing CHI to HUNG. HUNG suggests him to get CHI pregnant to keep her. He asks his subordinate RITA about ways to get CHI pregnant quickly. FUNG finds out that TUNG is the bookmaker of an illegal gambling organization. However, he cannot charge him because of lack of evidence. CHI finds out that SANG has taken away her contraception pills and threatens to break up with him.

SANG drinks in a pub and meets a Forensic Science Division Officer SUNNIE. He sends her home when she gets drink. However, the taxi driver drives them to a love hotel. He has to leave her in the hotel. He wants to get CHI’s heart again, but she proposes to put their relationship aside. Hung Ying organizes many high-profile illegal gambling activities. In order to destroy them completely, KEN orders HO to be an undercover in TUNG’s territory. YUEN knows that CHI is bothered and finds out that she and SANG are having a cold war. HO succeeds in becoming an undercover. FUNG worries for him and has nightmares often. SANDY is rude to CHI again and KEN breaks up with her. TAN and KAI see PAU having contact with SANG and worry that he will tell him their illegal gambling business, so they plan to murder him.

CHI is moved that SANG cares a lot for her and gets back with him. They attend to a ball together. He meets SUNNIE at the ball and worries that she will tell CHI that they have been to a love hotel, so he hides from her. TAN and KAI force PAU to hand out all the money from his illegal gambling business. With no way out, he calls SANG for help and promises to be the police witness to charge against TUNG. However, there is a fire at the place he is hiding and SUNNIE finds out that he is murdered. KEN and CHI finally finish the filming and they celebrate together. TUNG’s illegal gambling business brings in the organization good incomes. His name gets bigger than WING’s. WING is annoyed and drinks in a pub but meets some troublemakers. FUNG helps her out. SUNNIE recognizes SANG. He asks her to keep the love hotel event secret in case CHI will know about it.

KEN is a playboy. He likes to pursue models and actresses. His name often appears on magazines. Therefore, some reporters take pictures of him and CHI walking together. SANDY is an actress. She tells a magazine that CHI has stolen KEN from her. When CHI is stopped by some reporters in front of the police station, SANDY humiliates her in public. Her boss LEE is annoyed and assigns her a desk job. KEN is sorry for her punishment. CHI learns that SANG and SUNNIE have been to a love hotel and scolds him of unfaithful. FUNG receives some intelligence and wipes out TUNG’s illegal gambling business. KAI wants to destroy some evidence against TUNG, but is arrested. SANG begs for CHI’s forgiveness. Meanwhile, SUNNIE appears and CHI leaves with jealousy. CHI joins a rock climbing class. Coincidently, KEN is her tutor. She is thrilled when she gets to the top of the mountain.

CHI loses her mobile phone. KEN buys her a new one to please her. She invites him for dinner to thank him. During the dinner, she is upset that SANG has not called her for it is her birthday. Meanwhile, the birthday music starts and KEN celebrates with her. She gets drunk. When KEN sends her home, SANG thinks that he is rude to her and tries to punch him. She stops him in time. She suggests breaking up with him for he does not trust her. SUNNIE recombines some burnt paper, which reveals TUNG’s account book for the illegal gambling activities. KAI takes up all the charges. However, TUNG still worries that he will betray him and sends a hit man to kill him, but fails. KAI decides to turn around to be the police witness. TUNG suspects that there is an insider who tells the police about his plan to kill KAI. WING tells FUNG TUNG’s movement which arouses his suspicion over her intention.

TAN sets TUNG up to flee Hong Kong. FUNG and his subordinates arrive in time to stop them. TUNG resists to be arrested. They have a gunfight. When HO reveals his identity, TUNG tries to run and shoot back. Luckily, FUNG shoots TUNG dead. KEN wipes out TUNG’s illegal gambling activities. FUNG wants to post HO to the Regional Crime Unit, but KEN wants to keep him undercovered in order to destroy Hung Ying. SANG thinks that CHI leaves him because he has an affair with SUNNIE, so demands SUNNIE to explain to her. In fact, CHI leaves him because she is disappointed with his mistrust. He looks calm afterward, which worries MUI, ZHHEI and YUEN. TING takes a holiday with his wife KIT, who just arrives from the mainland. HO gets WING’s trust and is appointed to manage a nightclub. WING likes FUNG and tries to seduce him, but fails.

HUNG’s student ROCKEY in the garage is in debt from gambling. HUNG has to take on his debt. SUNNIE meets SANG who is already drunk in a pub. She sends him home and takes care of him all night. He sees SUNNIE when he wakes up and is shocked thinking that they have sex. MUI sees SANG and SUNNIE are close and thinks they are going out. CHUNG works for a food magazine and interviews MUI’s restaurant. SANG cooks many dishes especially for the interview and invites SUNNIE to taste. MUI praises SANG for his input in the restaurant. SUNNIE finds him caring for his family and likes him. The police force holds a shooting competition. SANG is proud of his shooting skills. He learns that KEN joins the competition and decides to compete with him. On the competition day, SUNNIE takes care of SANG. WING gives FUNG present for no reason and puzzles him.

SANG is moved when SUNNIE takes care of him during the competition. He and KEN got into the final. KEN wins by very small point difference, but SANG feels shame after the defeat. There are consecutive homicides in FUNG’s district. TING finds out that one of the victims worked as a helper for WING and owes her money. FUNG suspects that her death is related to WING. He sends some officers to follow her. He follows her to a pub and is drugged. He has sex with her and regrets it. KEN sets up a special team to investigate the serial killing. SANG is assigned to work with FUNG. KIT arrives in Hong Kong with her single way permit. TING supports her to open a massage parlor to continue her career as a masseuse.

SANG finds some paint residues on one of the victims YEE’s body, which is the same as the paint a wanderer SHAU uses, and suspects that he killed YEE. He waits for SHAU’s appearance and SUNNIE volunteers to accompany him. When he finally shows up, he talks nonsense and it is impossible to interrogate him. Therefore, SANG searches his flat to find some evidence, but retrieves nothing. SUNNIE admits to SANG that she loves him, which bothers him. CHUNG is thought to be shoplifting by mistake in a model shop. Luckily, CHI helps him out. HUNG is secretly meeting his ex-wife, SHAN. SUM thinks that he is having an affair. HUNG lied to CHI that her mother was dead when she was young. The sudden appearance of SHAN, who determines to meet CHI again, puts HUNG in a dilemma. FUNG is having some time with the family while WING suddenly appears to show him some pictures of them being intimate.… ...

CHI is bothered by SHAN’s appearance. KEN encourages her to listen to SHAN’s explanation. WING blackmails FUNG to be her lover with the pictures. He wants to tell YUEN the whole issue. But after she tells him that she has already applied for transferring to a desk job, he dares not to tell her as she sacrifices for the family. SHAN wants to reunion with HUNG, CHI and her mother LAN. However, HUNG cannot forgive her leaving without a word before. KIT’s ex-husband WAI meets her in her parlor. He is about to sexually assault her before her assistant LING yells and stops him. LING is attacked afterward. The police suspect that WAI has his revenge on her. KIT is asked to give a statement in the police station. She denies that she knows WAI. Apparently, she does not want TING to know that she has married before. WING demands FUNG to go traveling with her.

FUNG changes his attitude towards WING. In fact, he wants to gather evidence of her illegal activities. SHAN explains to CHI why she left her before. She buys LAN some coupons for a snake cuisine banquet to ask for her forgiveness. With CHOI’s help, WING works with a drug dealer TSAI to sell soft drugs. When CHOI finds out that she is going out with FUNG, he advises her to quit it as it might lead to troubles. During the banquet, SHAN tries hard to please HUNG and LAN, which annoys SUM. HO learns that WING is going to have a drug trade soon, so he sends a message to notify FUNG in Morse code. When he finds no one at the meeting place, he realizes that WING has tricked him. She starts to suspect someone in the organization tips off the police. CHOI expects FUNG to take action, so he tricks him to another meeting place.

WING sends YUEN the tape of FUNG and her having sex. YUEN is outraged and leaves home immediately. FUNG tells SANG about WING’s blackmailing and he advises him to tell his boss PANG and KEN. KEN orders FUNG to suspend his work for internal investigation. PANG worries about HO’s safety and wants to pull him out from undercover, but KEN objects. SANG takes over the serial killing case. He suspects that the killer will visit LING again. When WAI is arrested for harassing KIT, the police suspect that he is the killer. But soon it proves that he is not. KIT pays WAI to keep him quiet about her previous marriage. SANG advises YUEN to forgive FUNG and helps him to overcome the present difficulties. HO is sorry for causing FUNG’s suspension. He is in danger as WING finds out his identity. FUNG has lost contact with him and worries that he is killed.

WING takes HO hostage and meets FUNG in a warehouse. She wants him to leave Hong Kong with her. Things get physical when FUNG tries to save HO. Meanwhile, WING’s gun misfires and hurts HO and FUNG. HO falls into a coma. HO falls into a coma. Suddenly, CHOI appears and is disgusted with WING’s addiction in FUNG. He kills her by mistake and sets FUNG up for WING’s death. When YUEN visits FUNG in the hospital, he tells her the whole truth, which she believes. KEN insists that FUNG kills WING for revenge. SUNNIE is ill, but she continues working hoping that she can help to prove that FUNG is innocent. SANG and her go back to the crime scene to look for more evidence. She finds some bloodstains on a wooden box. However, she faints just when she is about to examine it. She keeps on working even when she is ill, which moves SANG.