Chow Ye is a member of the triad world , has retired and wants to live peacefully for the rest of his life. He transfers his business to his step son, Chor Chun San. But the only daughter of Chow Ye, Sui Kei falls in love with him, and Chow Ye wants his  daughter to marry him. Chow Ye over trusts Chor Chun San, who seems to manage his business successfully, however, on the contrary, he is doing illegal business, the poison, “white powder”and also flirts with the mistress, Laura behind Sui Kei who has no idea of the affair.

One day, Chor Chun San aends his follow, Black Dog to grab the “white powder” from Elderly Kam, who discovers the act and tells Chow Ye about it, he blames Chor Chun San. But he tells a lie saying he is the victim and has never does such illegal act.

However, Chor Chun San goes on with the illegal act, Chow Ye can not stand anymore, demands him to hand back the business for suspension. Chun Chun San is very ambitious, planning to kill Chow Ye, so that he can both marry Sui Kei, and obtain the property of Chow’s family He kills Yee Ye, pretending to console Sui Kei who does not know it is Chor to do it.

One day, Lo Kwai told Sui Kei about the killing which is planned by Chor Chun San, and also he has an affair with Laura. Sui Kei is under stress. She comes to the office to get a clear picture from Chor Chun San who is flirting with the mistress at the moment. Sui Kei holding a knife in her hand to take revenge for the killing of her father.. The follow of Chor Chun San, Ah Choi comes in and grab Sui Kei.

Sui Kei is confined to a sealed room, being threatened to hand the property documents and the stamp of the company to Chor Chun San. She refuses to do so. At this moment, Lo Kwai brings his follows to rescue Sui Kei sparkling a conflict. Finally, the policemen come and arrest the gangs.