After losing both parents at a young age, Lai Yat-tsau becomes a parent figure for his three younger sisters. His mother’s death and his father’s fall to drug addiction turned Yat-tsau into a very quick-tempered and chauvinistic man. Originally assigned to the Kwun Tong Police Station, Yat-tsau’s superior transfers him to the K-9 unit to work with police dogs, hoping that the strict training would better shape his character. At this new department, he develops a partnership with veterinarian Ma Chi-ho, who helps him solve cases for the police.

Police officer LAI YAT-CHOW's main mission today is to follow a gangster; on the other hand, Sergeant FAI CHUNG-LIM gets in touch with CHING-CHING. CHUNG-LIM calls YAT-CHOW and tells him to arrest the gangster so as to get his USB flash…
MA CHI-CHUNG and his co-worker ship the dog, BROTHER, to the animal shelter run by the Agriculture, Fisheries and Conservation Department (AFCD), where CHI-CHUNG's older sister, MA CHI-HO, immediately tends to BROTHER's wound after seeing…
With the video of the dispute between SHUK-FAN and CHI-HO uploaded to the internet by a third party, YAT-CHOW and his family members come to realise CHI-CHUNG's difficult childhood after viewing the video. YAT-CHOW goes to have a word…
YUEN-KWAN walks into the police station with a bouquet of red roses, showing them off in front of the other police officers. WAI-KIN tells YAT-CHOW to go to a firing range and asks him about CHI-CHUNG's response. YAT-CHOW recalls that…
YAT-CHOW is going to be sent to the Police Dog Training School for training, and he is convinced that it's WAI-KIN who transferred him on purpose. WAI-KIN disciplines YAT-CHOW, commanding him to run extra miles, following which WAI-KIN…
WAI-KIN and CHI-CHUNG arrive at the hospital, but CHI-HO is nowhere to be found. After WAI-KIN comes to CHI-HO's home, CHI-HO tells her that the dog had puppies before it died, so she is going to search for the puppies together with…
CHUNG-LIM and SHUK-CHI eventually sign the marriage licence, but after SHUK-CHI shows CHUNG-LIM the photos taken by the private detective, CHUNG-LIM flies into a rage and wants to divorce her. At the school, SHUK-CHU always helps people…
CHUNG-LIM and SHUK-CHI eventually sign the marriage licence, but after SHUK-CHI shows CHUNG-LIM the photos taken by the private detective, CHUNG-LIM flies into a rage and wants to divorce her. At the school, SHUK-CHU always helps people…
CHI-HO reveals to YAT-CHOW that BROTHER suffers from separation anxiety, yet in accordance with the regulations of the PDU, the former dog handlers are forbidden to see their dogs once the dogs are donated to the PDU. It's not until…
Since YAT-CHOW is still unable to earn BROTHER's trust, CHI-HO frankly discloses that she would have to disqualify him from being the police dog handler if there is no improvement at all. CHI-CHUNG tells SHUK-FAN that he is not going to…
When YAT-CHOW and CHI-HO are searching for BROTHER in a forest, BROTHER suddenly appears and leads them to go deeper into the forest, where they find a woman lying on the ground. SHUK-CHI is determined to sell her wedding ring, and she…
CHUNG-LIM is going to be disciplined for his aggressive behavior in the hospital, yet he still misses SHUK-CHI; whereas YAT-CHOW is informed by SHUK-CHU that SHUK-CHI went missing after learning that CHUNG-LIM decided to divorce her.…
Bringing along the watch, KAM-PO goes to have a word with LEI-SZE, who instead takes the issue lightly; whereas KAM-PO notices there are police officers nearby, leaving him no other choice but to stay in a convenience store and get drunk.…
SHUK-CHU and the others claim that the reason why CHUNG-LIM was out of control is because he was drugged by someone, but SHUK-CHI doesn't believe it, above which she insists that CHUNG-LIM is addicted to drugs. Once again, KAM-PO has…
KAM-PO attempts to flee Hong Kong, but once he thinks of SHUK-CHU, he is still reluctant to leave. Ever since YAT-CHOW suffered injuries, BROTHER has refused to eat anything. Having learned about YAT-CHOW's injuries, KAM-PO can't help…
Being informed about the discovery of a dead infant on the street, BROTHER is instructed to track the scent, during which they run into the perpetrator, but BROTHER is too afraid to enter the ventilation fans. YAT-CHOW frankly discloses…
On the day when CHI-CHUNG is taking the exam, SHUK-FAN specifically goes to the examination venue to wait for him. To her surprise, she sees CHI-CHUNG leave the examination venue early, so she goes to scold him about it. However, she…
CHI-HO not only takes YAT-CHOW to the party held by WAI-KIN but also announces their romantic relationship in a high-profile manner, which exasperates WAI-KIN beyond endurance. YAT-CHOW realises that he is just a pawn and attempts to…
With KAM-PO suddenly vanishing without a trace, YAT-CHOW spots someone wearing KAM-PO's watch, so he follows the scent only to find out that person is going to obliterate all traces of KAM-PO. KAM-TONG comes to the police station to take…
CHUNG-LIM urgently calls up YAT-CHOW, claiming that he took a photo of the person who uploaded the drug formula online. YAT-CHOW takes a look at that person and to his surprise, that person turns out to be KAM-TONG. Going to a bank to…


























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