A detective, Lee is going to retire soon, while he is investigating a jewelry store arm robbery case. He has a gunfight with the armed thieves from Mainland China and kills one of the thieves. The thieves are trying to escape. Ling hide the jewelry inside the lift system, and threat Lee with a grenade.
Police officer Cheng (Michael Wong) gets into a brawl with another man while he's off duty out of town. When the other man is found murdered the following day, Cheng assists the local authorities in their investigation, despite their drastically different crime-solving methods.
Nam was originally a Vietnamese soldier, yet because he hated the cruelty of war, he fled to Hong Kong and was placed in a refugee camp. Anan reunites with his long-lost brother in the camp. The two hope to immigrate to France and have a new life. In the refugee camp, the two gangs headed by big bully Kei and Kuen, who often fight openly and secretly for power.