DING SIU-KA and her three foster mothers operate a foot spa together. She is also an undercover officer working for CIB chief inspector HONG TO-HANG. CHEUK HOI is TO-HANG's colleague. He is suspected of corruption and the ICAC is carrying out investigation on him. CHEUK HOI tries hard to find the dead body of his undercover officer and he swears that he will not let another undercover officer die. When he returns to the police station, chief inspector from the Organized Crime and Triad Bureau (OCTB) YIP SHIU-LEUNG provokes him. SIT KA-KEUNG appears to be an ice delivery worker but he is actually a member of an illegal betting syndicate. SIU-KA's foster mother is in debt and KA-KEUNG arrives to make trouble at their foot spa. SIU-KA tries to get the cash and the receipt for borrowed money from KA-KEUNG but KA-KEUNG discovers it. YAU TAT-FU, nickname Flounder, is a triad leader.… ...

KA-KEUNG is released. He immediately goes to the foot spa with his subordinate CHEUNG MUK-WING for he wants to get back the account record and name list from SIU-KA. TAT-FU praises KA-KEUNG and KA-KEUNG requests to be the person in charge of his illegal betting business. CHEUK HOI wants to get some important information from TO-HANG's computer but he doesn't have the password. KA-KEUNG tries to fight for the right to handle the illegal betting business and he is being chased. SIU-KA is embroiled in it as well. TAT-FU tries to mediate between the two groups and he suggests choosing the person in charge based on their profits. In order to find TO-HANG's undercover officers, CHEUK HOI attends his funeral. SIU-KA attends the funeral secretly and CHEUK HOI discovers her. SIU-KA passes CHEUK HOI's test and she becomes his undercover officer.… ...

MUK-WING is being cheated during betting. He tries to get back the money from his enemy but he is captured. Luckily, SIU-KA knew that KA-KEUNG will be in danger and she goes to rescue them. HO-KAN and FOON-HEI get to know each other in the prison. FOON-HEI is very upset to discover some prisoners trying to operate usury in the prison and HO-KAN tackles the problem. FOON-HEI is very pleased and he promises to offer works to him later. When TAK-FU tries to announce the result for operating the illegal betting business, SIU-KA arrives to help KA-KEUNG and KA-KEUNG wins eventually. SHIU-LEUNG tries to carry out investigation on the illegal betting syndicate but CHEUK HOI is not willing to cooperate with him. SHIU-LEUNG decides to get information from SIU-KA. HO-KAN is released from prison eventually and he starts working in a stock agency but two gangsters suddenly arrive to capture him.… ...

SIN-YAN suspects that CHEUK HOI is bribed by FOON-HEI and CHEUK HOI tries not to disclose the truth to her. FOON-HEI visits SIU-KA's foot spa on the election day for the gang leader. He then asks SIU-KA to be his spokesperson in a meeting with TAT-FU. FOON-HEI meets up with TAT-FU alone and he lures him to gain money from the stock market together. HO-KAN and SIN-YAN were lovers. In order to carry out his duty, HO-KAN has committed crime. SIN-YAN didn't know the truth behind and she decided to separate with him. HO-KAN helps TAT-FU to earn a lot of money within a short period of time. TAT-FU worries that FOON-HEI will harm him after knowing that he has kidnapped his son before. He tries to shift the blame to KA-KEUNG and he beats KA-KEUNG fiercely. SIU-KA brings KA-KEUNG to her foot spa for a rest and she makes excuse to gamble with him but she loses eventually.

In order to capture TAT-FU, CHEUK HOI carries out investigation at the warehouse and he is embroiled in a gangster fight accidentally. In order to rescue TAT-FU, KA-KEUNG fights against the gangsters with CHEUK HOI. FOON-HEI has established an unassailable position in the gang. He wants HO-KAN and KA-KEUNG to collaborate with each other. CHEUK HOI investigates the clues left by TAT-FU and he has new findings. FOON-HEI organizes a banquet for KA-KEUNG and other subordinates. SHIU-LEUNG suddenly arrives with a group of police officers and he brings SIN-YAN to HO-KAN deliberately. Senior management of ICAC asks SIN-YAN to stop her investigation on CHEUK HOI. SIN-YAN tries to air her grievances to SHIU-LEUNG and SHIU-LEUNG proposes marriage to her. SIU-KA's foster mother worries that KA-KEUNG will make SIU-KA die and she asks KA-KEUNG to separate with her. SIU-KA tries hard to speak for KA-KEUNG.… ...

KA-KEUNG is beaten up by the gangsters fiercely and he believes that they are FOON-HEI's subordinates. KA-KEUNG and SIU-KA go to question FOON-HEI but FOON-HEI's subordinates try to make things difficult. SIN-CHING is beaten up by her husband WING-KUEN regularly but she tries to be forbearing all the time. In order to help SIN-CHING, CHEUK HOI becomes the instructor of her interest class. He follows SIN-CHING home secretly and discovers that she is beaten up by WING-KUEN again. SHIU-LEUNG and SIN-YAN start making preparations for their wedding. HO-KAN is heartbroken and he decides to stop working as an undercover officer. FOON-HEI wants to get involved in Hong Kong's drug market but the drug trafficker is not cooperative. FOON-HEI asks KA-KEUNG to steal the drugs from the drug trafficker's kennel. SIU-KA follows KA-KEUNG secretly and she meets HO-KAN. KA-KEUNG and SIU-KA are pretending to be lovers only.… ...

The drug trafficker who refused to collaborate with FOON-HEI is being killed in the detention house. FOON-HEI gains full control of Hong Kong's drug market successfully. FOON-HEI appreciates KA-KEUNG and he asks him to handle the drug trafficking business for him. SIN-YAN accidentally discovers the eavesdropping device from CHEUK HOI. On the other hand, CHEUK HOI invites SIU-KA to meet up for information exchange. In order to get rid of SIN-YAN, CHEUK HOI runs away with SIU-KA by car. SIU-KA learns that CHEUK HOI is being investigated by the ICAC. Together with HO-KAN, they try to find out if CHEUK HOI is trustworthy. FOON-HEI asks KA-KEUNG to meet up with the overseas drug trafficker in the hotel. SIU-KA accompanies KA-KEUNG to the hotel and the drug trafficker asks SIU-KA to taste the drugs. In order to protect SIU-KA, KA-KEUNG tastes the drugs instead. The transaction is successful but KA-KEUNG is dying.

The drug trafficker who refused to collaborate with FOON-HEI is being killed in the detention house. FOON-HEI gains full control of Hong Kong's drug market successfully. FOON-HEI appreciates KA-KEUNG and he asks him to handle the drug trafficking business for him. SIN-YAN accidentally discovers the eavesdropping device from CHEUK HOI. On the other hand, CHEUK HOI invites SIU-KA to meet up for information exchange. In order to get rid of SIN-YAN, CHEUK HOI runs away with SIU-KA by car. SIU-KA learns that CHEUK HOI is being investigated by the ICAC. Together with HO-KAN, they try to find out if CHEUK HOI is trustworthy. FOON-HEI asks KA-KEUNG to meet up with the overseas drug trafficker in the hotel. SIU-KA accompanies KA-KEUNG to the hotel and the drug trafficker asks SIU-KA to taste the drugs. In order to protect SIU-KA, KA-KEUNG tastes the drugs instead. The transaction is successful but KA-KEUNG is dying.

SIU-KA is beaten up by FOON-HEI's subordinate and HO-KAN arrives to stop it. KA-KEUNG arrives to help as well. KA-KEUNG and SIU-KA try deceive FOON-HEI by acting in front of him. HO-KAN returns to the hotel to meet up with FOON-HEI and the others. In order to gain trust from FOON-HEI, he pretends that he is being chased by the police. Since FOON-HEI has cancelled his plan, the drug dealer ON LAM returns to her hiding place to meet up with the one behind the scene, SHUNG KAM. SHUNG KAM and FOON-HEI used to be partners. However, FOON-HEI has betrayed SHUNG KAM and SHUNG KAM wants him to die. MUK-WING suddenly borrows money from KA-KEUNG. SIU-KA and KA-KEUNG follow him and they discover the truth. WING-KUEN leaves the hospital. He suddenly treats SIN-CHING kindly and he tries to borrow money from her. With MEI-YIN's help, CHEUK HOI monitors WING-KUEN with eavesdropping device and he discovers that WING-KUEN has deceived SIN-CHING.

WING-KUEN has come to a dead end and he decides to kill SIN-CHING by gas leak. CHEUK HOI arrives at SIN-YAN's home coincidentally and he rescues them with HO-KAN. WING-KUEN tries to run away by abducting SIN-CHING to a car and CHEUK HOI chases after them madly. HO-KAN and SIN-YAN are caught in the gas explosion. FOON-HEI's son LONG-SING has started a fight with others and the teacher invites FOON-HEI to meet up. LONG-SING has started a fight with other classmates because they say that FOON-HEI is a gangster from the triad society. FOON-HEI visits SIU-KA's foot spa and all the foster mothers are overjoyed. They are surprised to discover that all of them are interested in FOON-HEI. SIN-YAN is absentminded all the time after the explosion. SHIU-LEUNG is very jealous and he decides to fight against HO-KAN. KA-KEUNG discovers that other gangsters are invading MUK-WING's territory.… ...

After getting information from all the undercover officers, CHEUK HOI decides to arrest FOON-HEI and the others when they are trafficking drugs. However, when they are carrying out their duty, SHIU-LEUNG suddenly arrives with a group of police officers to monitor them. FOON-HEI asks SIU-KA and KA-KEUNG to go to the countryside with ON LAM for drug trafficking while he greets the buyer with HO-KAN and the other subordinates. When KA-KEUNG and the others arrive, they are being attacked. SHUNG KAM has arranged everything for he wants to get FOON-HEI's drugs and money at the same time. After knowing the truth, FOON-HEI decides to retaliate. In order to rescue SIU-KA, KA-KEUNG is injured and he is being abducted as well. SIU-KA wants to rescue KA-KEUNG and she decides to ignore CHEUK HOI's order. With her body wrapped in explosives, she visits ON LAM alone with all the drugs.

FOON-HEI's son has died and he is very angry. He tries to vent his anger by attacking the traitors in the organization. CHEUK HOI meets up with all the undercover officers. HO-KAN cannot bear it anymore. He reveals his dissatisfaction and he wants to quit the job. HO-KAN meets up with SIN-YAN. SIN-YAN tells him a secret and HO-KAN is deeply shocked. HO-KAN is missing suddenly and he takes away all the money from FOON-HEI. FOON-HEI asks his subordinates to chase after HO-KAN. KA-KEUNG informs CHEUK HOI about it. CHEUK HOI discovers HO-KAN's whereabouts and HO-KAN is trying to commit suicide. Encouraged by CHEUK HOI, SIN-CHING returns to work at the law firm she used to stay before but a child abuse case is troubling her. The police is searching for FOON-HEI since he has made great troubles in town and FOON-HEI is not able to attend his son's funeral. SIU-KA is softhearted and she brings FOON-HEI to the funeral parlor secretly.

On the way home, SIU-KA is drunk and she seizes the chance to declare her love to KA-KEUNG. SIN-CHING meets up with CHEUK HOI frequently and their relationship is getting very close. The tycoon SUNG YIN-TING parks his car at MUK-WING's territory and his car is robbed. MUK-WING helps him to find the stolen items successfully and YIN-TING appreciates it very much. MEI-YIN is missing after following somebody but SHIU-LEUNG is not trying to find her. When CHEUK HOI and the others are working, SHIU-LEUNG suddenly arrives at the hiding place of SIU-KA and the other undercover officers with a group of armed police officers. FOON-HEI's boss urges him to handle the land resumption project at Northeast New Territories. FOON-HEI asks SIU-KA and the others to meet up with the tyrants from New Territories together. ON-YEE returns home and discovers that TO-HANG's gift is missing.… ...

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