Even though Pak Kiu insists that Lap Man is an undercover cop, Lap Man brushed that thought off as ridiculous! He insists that he's a real triad member and it's all because of Pak Kiu who told on him helping Hau Ko to transport drugs.
Hau Ko has some engagements and assigns Laughin to hold the weekly meeting at Chun Hing on his behalf. Jor Lun is unhappy with the arrangement and starts a ruckus. However, Fai Ye (a triad elder and also Jor Lun's father) manage to settle the issue and instructs Jor Lun to shut up. When Laughin questions Chung about the set up of the drug business, Chung remains tight-lipped and says he is only answerable to Hau Ko alone.
Laughin was drinking with Lap Man in Mega when he heard a news report about a death of a policewoman. The policewoman is Wendy his ex-girlfriend. He gets really drunk and keeps on saying that he is indebted to Wendy. Lap Man was helping Laughin home when Sam Jie sees them by the side of the road. She offers to let Laughin stay over at her place.
As Lap Man was leaving Sam Jie's place, Yau Yau and Hau Ko return. Yau Yau asks Lap Man how he celebrate his recent birthday but Lap Man says he went out drinking and singing Karaoke with La Ba and the gang. They even had call girls accompanying them for the night.
Laughin wakes up from his drunken slumber and Sam Jie made him Ginseng tea. Sam Jie asks about Wendy and he shares his heartbreak story with her.
Yau Yau interrogates La Ba about the night of Lap Man's birthday. La Ba reveals that although there were call girls, he was the one present, while Lap Man wasn't there at all. Yau Yau is happy to learn that Lap Man had lied to her and goes off to confront him. To be nearer to Lap Man, Yau Yau hangs out at Mega Disco and the snooker center. Lap Man feels uneasy when she mixes with other guys. Finally Lap Man agrees to be friends again with Yau Yau. They do the silly things they used to do such as going out on pretend dates, which caused Yau Yau to develop even more feelings for Lap Man.
Yuk Bo and Pak Kiu starts to date and they dine at Fa Si Lai and Sam Jie's restaurant unknowingly. When Sam Jie appears, Yuk Bo lost her appetite and refuses to eat. Fa Si Lai realises that Yuk Bo will be going home soon and she has to be there before Yuk Bo returns. As she is rushing, Sam Jie offers to send her.
Fa Si Lai admits to Sam Jie that she should be telling Yuk Bo the truth that Sam Jie is her real sister and not cousin. Yuk Bo overheard the conversation and storms off. Sam Jie chases after her and the two sisters have another confrontation. Fa Si Lai who was waiting for them nearby was attacked by one of the "Head Hitters" and has to be rushed to the hospital.
Doctor confirms that Fa Si Lai's brain is bleeding and she needs surgery, but there are risks. If she does not have surgery, they can hope for the blood clod to slowly dissolve but if it doesn't then Fa Si Lai's life will be in danger. Both Yuk Bo and Sam Jie are at a loss and could not decide what is best for their mother.
Hau Ko instructs Laughin and Lap Man to track down the head hitter culprit, while Pak Kiu is also looking for the suspect. Pak Kiu and Lap Man managed to track the suspect to a abandoned outskirt area. There were four motorbikes used by the head hitters. Lap Man and Pak Kiu managed to overpower the suspect. Lap Man wants to bring the suspect back to Chun Hing but Pak Kiu asks Lap Man to surrender the suspect to the police. Pak Kiu reasons that if the suspect is brought back to Chun Hing he will definitely die. Laughin who arrived shortly to help Lap Man witnessed Pak Kiu and Lap Man's exchange. Laughin now suspects Lap Man's identity.
Laughin and Lap Man informs Hau Ko that the head hitter was arrested by the police first. Hau Ko is disappointed as he knows the suspect will only be imprisoned even though Fa Si Lai is on the verge of death. Laughin hints to Lap Man that he is the leader and Lap Man must stay true to him.
Wu Sir praised Pak Kiu's team for solving the case quickly although they are still unsure who is the real master mind behind the team of head hitters.
Although Fa Si Lai is still in critical condition, Yuk Bo reports for duty. On one of their rounds, Yuk Bo even managed to save a drowning woman and completes her responsibility as a police officer. Chiu Sir is very proud of Yuk Bo and praises her.
Hau Ko hires a neurosurgeon from Singapore to treat Fa Si Lai. Yuk Bo is unhappy that the surgeon is hired by Hau Ko as the money used to pay the surgeon is "dirty money". The surgeon informs them that Fa Si Lai's condition is worsening and they cannot hold off having the surgery any later. Yuk Bo refuses to listen to Sam Jie's advise so Hau Ko tells Pak Kiu to advise her as he is the only rational one.
Hau Ko convinces Sam Jie to go ahead with the surgery regardless of what Yuk Bo thinks. Laughin chips in and helps Sam Jie toss a coin to decide. In the end, Pak Kiu also successfully convinced Yuk Bo to agree to the surgery. The surgery was supposed to take 10 hours but it got extended. Yuk Bo and Sam Jie worry endlessly and seeks comfort in each other's embrace.
The surgery was successful and Fa Si Lai has no problem recognising everyone present at her bedside. She also found out that Yuk Bo and Pak Kiu are dating and is delighted.
Hau Ko sends a very tired Sam Jie home. When they reached, Sam Jie was already asleep in the car so Hau Ko decides to let her sleep and not wake her up. When she wakes up much later, she was touched by Hau Ko's thoughtfulness.
Yau Yau invites Lap Man over to her house after assuring him that Sam Jie and Hau Ko will be out. She tells him that she will be giving him the most important thing in her life... which is the completed draft of her travel book!
When Yau Yau's travel book was published, she asks Lap Man to bring a few copies over to Pong's comic bookstore to give to her old friends. Lap Man told Pong that Yau Yau is interested to rekindle their friendship and asks them not to judge Yau Yau harshly as she is innocent of Hau Ko's misdeeds.
Laughin finally has the complete trust from Hau Ko and is sent to receive drugs. Laughin still does not know where the factory is as he is only tasked to receive the drugs. Someone will be collecting it later on. After receiving the drugs, Laughin realise that he was followed. It was Lap Man! Laughin gave him 2 options; either he dies there and then or Laughin lets him off but he has to kill himself.
Lap Man recovers and looks for Laughin. He thanked Laughin for sparing him his life and says Laughin now owns him. Laughin dares Lap Man to snatch a patrolling police officer's gun. Laughin stopped Lap Man just before Lap Man attacks the officers. The patrolling officer is Chiu Sir who happens to train Laughin in P.T.S! Lap Man was shocked to discover that Laughin used to be in P.T.S but never completed his training and confronts him if he is also an undercover!
Laughin completes the drug task successfully. Hau Ko praises and rewards him for a job well done. Laughin asks Hau Ko why is the whole drug process (from receiving to delivering to making and distributing) so complicated as each step is handled by different persons. Hau Ko explains that this way, no one would actually know where the actual drug making place is except Chung. Even Hau Ko himself doesn't know where the factory is. And the lesser people knows, the safer the factory is.
Lap Man accompanies Yau Yau to a cafe and they bump into Pak Kiu and Yuk Bo. The two friends chat a little when they queue up for their drinks. Lap Man is happy for Pak Kiu that he is now dating Yuk Bo while Pak Kiu praise Yau Yau for being a good girl even though she comes from a family with complicated background.
Yau Yau notices that Yuk bo is reading her travel book and Yuk Bo even asks Yau Yau for autograph. Yau Yau praises "Lucky Prince" and says that he is the perfect gentleman. Yau Yau belittles Lap Man and says he is incomparable to the charming and supportive "Lucky Prince". Yuk Bo encourages Yau Yau to set up a meeting with "Lucky Prince".
Lap Man is sad that Yau Yau criticized him without knowing that he is the actual "Lucky Prince". He goes drinking at Mega and was joined by Laughin. Laughin sends Lap Man home and goes through his computer and finds out that Lap Man is "Lucky Prince". Laughin indirectly hints to Lap Man that if he were to become Yau Yau's boyfriend, he can get closer to Hau Ko and gains his trust faster. It will be easier for Lap man to perform his duties.
Pak Kiu interrogates the head hitter that was caught earlier and finds out who the mastermind is. The mastermind is Lat Kai and he is a triad leader in New Territories. He now wants to expands his base and wants to take half of what Chun Hing has. Pak Kiu is worried that the two triads will clash and there will be chaos soon.
Sam Jie and Yuk Bo go together to fetch Fa Si Lai from the hospital. Yuk Bo wants to pay Sam Jie back for Fa Si Lai's medical expenses but Sam Jie declines. After this tragedy, Fa Si Lai wishes to see Yuk Bo marry and invites Pak Kiu over without Yuk Bo's knowledge. Fa Si Lai hints to Pak Kiu that she hopes Yuk Bo can marry soon and Pak Kiu agrees. However, after dinner, Pak Kiu confesses to Sam Jie that he has no intention to marry yet. Yuk Bo overhears their conversation and is disappointed.
Lat Kai goes and see Hau Ko and demands for a few places under Chun Hing's watch. Hau Ko brushed Lat Kai off but Lat Kai warns that Hau Ko will beg him to take the places in exactly 2 minutes. Two minutes later, a bomb goes off in Mega Disco. Later on there are many bomb threat reports being made. The bombs are placed in the same type of bag as the one that exploded earlier at mega Disco and all over Chun Hing's businesses. Some of the bags contain papers and garbage but the one that Yuk Bo opens contain a real bomb.
Yuk Bo has to hold on to the bomb latch until the bomb expert arrives. Pak Kiu learns of the situation and rushes to be with her. He assures her that he loves her and wants to marry her. It's just that he is worried as all the people he loves tends to leave him one after another, starting from his mother, father and Fiona.
Sam Jie goes to the bomb threat area to check on Yuk Bo and was relieved that She is fine. Sam Jie then receives a call from Jor Lun telling her that he could not pacify Fai Ye and asks for Sam Jie's help. When Sam Jie reaches Jor Lun's place with Hau Ko and Laughin, Jor Lun and Fai Ye was not around so they waited. The maid receives an obscure package and placed it in the hall. The bomb explodes!!!