Trying to keep a good life and a steady paycheck, a tough-as-nails man from the meanest street in the city makes ends meet as a security guard at a prison. Half the men behind the bars he guards are from his past, unable to avoid the temptations and traps he's tried so hard to keep away from. He manages to keep his life and job separate, until an all out full blown prison riot erupts, setting free 6 of the prison's toughest cats. They're off to get their revenge on Sgt. Chan, the honest cop that put them behind bars...that is unless his adopted son Shaf-Tin can stop them first!