Even when they were orphans, Wang Yizhi has always been in love with Xinxin. Now older, Yizhi decides to train as a boxer before he allows himself to profess his love, but only for her to fall for a geeky computer engineer who is secretly a popular superhero. When Xinxin gets kidnapped, Yizhi must prove his love and his fighting skills to get the girl of his dreams.
Northern Lights Insurance Company has a team of insurance investigators that is led by Fong Chi-Keung, the wealthy heiress Do Sam-Yu, the affectionate Bak Tin-Ming, and retired police officer Cheung Dong. They each have their own talents and they form a legendary team in the insurance industry. They thoroughly investigate and uncover the truth in all thorny, dangerous or strange cases that are passed to them.
Apart from succeeding his father as the owner of the social club, Hau Tak-sze is also a mediator, smoothing things out with unconventional measures for people from all walks of life. Due to a divorce case, he gets to know Mo Sui-yee, who is in the process of divorcing her cheating ex-husband. Through Sui-yee, Tak-sze also becomes acquainted with her sister, cousin, and co-worker. But just as they are becoming close, Sui-yee's ex-husband reappears, and their lives and relationships are driven to the brink of destruction...
Senior correctional officer Man Sheung Shing is stationed at the Stanley Prison and is in charge of prisoner discipline. Clashing with prisoners every day, he is under heavy pressure and must act carefully every step of the way. In contrast, his subordinate Kiu Ching Kiu frequently ignores the rules and has close contact with the prisoners, even developing a relationship with one of them. This causes a lot of tension between them. Yiu Ngoi Ka, who works at the Lo Wu Correctional Institution, has known Sheung Shing for many years. Despite their ten year age gap, she bravely expresses her love for him, but is met with his swift rejection. The ordeals inside and outside the prison cell lead to complicated stories that most people cannot understand. With a large riot waiting to break out, Sheung Shing and his colleagues' lives are put into danger.
Elite financier Damon Cheuk Yuk never hesitates to use any dirty tricks to gain a profit, so he has always been under close surveillance by the Commercial Crime Bureau (CCB). Being obsessed with money and power, Damon constantly neglects his family members and friends. Because of him, his wife and mentor passed away, yet he shows no remorse at all. On the contrary, his craving for money and power continuously increases. When his brother-in-law, a CCB inspector, renews determination to put him behind bars, it launches a series of events that slowly undermine Damon's ambition. In the fiercely competitive finance industry, who will eventually come out on top?
Public Relation expert Heung Kwong-Nam (pun, meaning "Hong Kong men") is a renowned saviour to the single ladies in town. He is able to help many single female clients find a happy marriage by building confidence. Without charging money, he is able to find purpose in helping these women find love and themselves. Newly joined Account Officer Sing Fa-Lui (pun, meaning "unmarried woman") is hired by Mak Dik-Man as Kwong-Nam's rival. At first, she is an overly-confident girl that sees Kwong-Nam and his group (Super Senior) as lazy and good-for-nothing. But she eventually grows to see the good in Kwong-Nam and his methods and they end up falling love.
When a secret police operation fails, sniper Lee Ho-yeung develops a personal grudge towards his co-worker Ko Chun-kin. Ho-yeung eventually decides to leave the police force and becomes the president of a firearms association, colluding with organized crime on the sky. Through abusing the trust of an unknowing detective and the trust of his girlfriend who still works with the police unit, Ho-yeung has secretly been working against Chun-kin, who has been kept in the dark the whole time. But when Chun-kin starts to suspect the clues within multiple murder cases, a tense standoff between the brothers unfolds.
Gordon Heung and Wai Sai-Lok have been long-time collaborators in the police force, frequently working with each other to solve drug trafficking cases in the city. During an operation, Sai-Lok discovers clues that point to Gordon being a corrupt cop in a collusion conspiracy with drug dealers. Suspicious about Gordon's true intentions, Sai-Lok launches a secret investigation on him.
Senior Forensic Chemist Jack 'Pro Sir' Po is the head of the Forensic Department and is skilled at analysing criminal psychology. He has a unique view on human nature and is familiar with the structure of various firearms. Pro Sir works closely with Senior Pathologist Mandy Chung in a wide range of fields including psychology, anthropology, criminology and forensic science.
Kate Tsui Tsz-Shan is a Hong Kong actress most well-known for her career with broadcaster TVB. She is the 2004 Miss Hong Kong pageant winner. In June 2019, she graduated from the University of Hong Kong with a Master's degree in Psychology.