The Brink Of Law * Dat Wai Hang Tung *

Cast:
Steven Ma Chun Wai ~ Tong Chi Ko
Ron Ng Cheuk Hei ~ Tung Yat Tsun
Bernice Liu Bik Yi ~ Wing
Shirley Yeung
Kate Tsui
Michelle ~ Kam Chi
Ha Yu
Steven Wong Ka Lok

Series start out with Tong Chi Ko (Steven Ma Chun Wai) attending a horse race with his father. The head of a rich corporation, Tung Chin Long, is also there with his nephew Tung Yat Tsun (Ron Ng Cheuk Hei). Tong Chi Ko meets Tung Yat Tsun during the race and they become good friends. Chi Ko's father is an avid gambler and uses bookmarking to fund his bets. He accumulates a huge debt, which causes major fights in the family. Chi Ko's mother and sister leaves, which makes his father so depressed that he commits suicide. His mother had actually gone to mainland China to sell some property to raise money.
Chi Ko's sister starts to hang out with Tung Chin Long's younger son, a troublemaker. Chi Ko tries to stop them from seeing each other, and just then, cops show up at Tung Chin Lon's son's bar. He stealthily sneaks into Chi Ko's pocket the drugs he was going to use on Chi Ko's sister. Chi Ko loses his lawyer license for the drug possession. With the help of Tsun, he becomes the legal advisor for Tung Chin Long's fashion company, Nicolas.
Chi Ko runs into his high school lover Wing (Bernice Liu Bek Yi) who had left to Canada when they were young and had not been in contact since. They start a budding relationship, but Chi Ko's best friend Ming expresses his love for Wing (Ming did not know then about Chi Ko and Wing's relationship). Since Ming had previously given him money to pay off his father's debt, Chi Ko did not tell Ming that he liked Wing. Several unfortunate events caused Wing's attempt to meet with Chi Ko to not occur previously, and this time, Chi Ko's rebellious sister deleted Wing's SMS message to Chi Ko. Wing thinks that Chi Ko doesn't want to get back together with her and accepts Ming. Wing realizes that she does not get along to Ming, and breaks up with him. However, Chi Ko and Wing did not want to harm Ming and decided against pursuing a relationship with each other. Ming overhears their conversation and tells them to get together. Meanwhile, Ming, who is a police officer, arrests Tung Chin Long's brother-in-law for bookmarking business. Tung Chin Long's wife Kam Chi seeks revenge for her brother by hiring an assassin to kill Ming. After Ming's meeting with Chi Ko and Wing, he is killed by the assassin. Later, Chi Ko realizes that Wing, who became a model in Nicolas, is having an affair with Tung Chin Long. They then breakup.
One day, Tsun sees his mother at Nicolas, who had left him right after he was born. She had come to see Tung Chin Long to get money from him to help with her new husband's financial troubles. Tsun overhears their conversation that Tung Chin Long had raped her while he was drunk, and that Tsun is actually his son. When Tsun's father Chin Pang hears of this, he decides to leave, and Tsun proposed the USA to treat Chin Pang's heart disease. Before they leave, Chin Pang and Chin Long had a fierce fight on whether Tsun should go with Chin Pang or stay in HK. It triggers a heart attack, and Chin Pang dies because Chin Long kept his pills from him. Kam Chi thinks that Tsun wants to take Chin Long's fortune away from her dearest son Long, who had been paralyzed from a skiing accident, hires an assassin to kill Tsun. Chi Ko had gone to the place to meet Tsun and sees him as the assassin made the move. They fight off the assassin, who leaves behind a keychain. It was a collectible keychain is a gift from Ming to Wing, which he was carrying the night he died. Chi Ko suspects that it was not a simple robbery because the thief kept attacking Tsun after he took the money. He talks to Ming's head, Madam Wong, who tells him of Kam Chi's suspected bookkeeping and underground firearms business. He is then hired to be a mole and get information from Kam Chi.
The rest of the plot involves how Chi Ko, Wing, and Tsun try to find evidence to nail Kam Chi and Chin Long for their crimes, with more deaths, complicated relationships, and problems within the Tung family that lead to their demise.