In one of the darkest and diverse cultural part in the city, there is a minority group who lives in the place where it is full of despair and frustration. Their desperate living comprises illegal gambling, prostitution as well as drug-dealing. This chaotic region is unique within the city. On one occasion, a cop, Mickey, and a theft, Tai-hoi, riding in a vehicle, unexpectedly crashes into the iron gate of the restricted region. Both men are severely injured and lose their conscious. After they woke up, they found themselves chained up by Crow and his followers. Crow, who is the ruler of the restricted region, hates police and he decided to execute Mickey and Tai-hoi because he believes that one of them is a cop. Meanwhile, a charming woman called Ling, suddenly steps forward from the crowd and revealed that she had worked with Mickey doing the burglary business in the olden days. And so, Tai-hoi remains in custody and Mickey left with Ling. Ling accuses Tai Hoi mainly because he is her husband who did not responsibly take care of her and her daughter, Yan, in the past, remaining them to be rudely controlled by Crow for years. Furthermore, she hopes Mickey can help her to escape from the restricted region. At the same time, a fatal virus is spreading all over the restricted region. And the government is decided to send cops to kill all human and animal inside the restricted region. Crow orders his followers to counter the invasion of the anti-virus cops. What will be the fate of Ling, Mickey, Tai Hoi and Yan?