Not quite, first of all a prison bus containing Napoleon (Darwin Joston) and Wells (Tony Burton) turns up requiring use of the cells. Then Lawson (Martin West) staggers in, on the run from the gang. He killed one of their members in revenge after they gunned down his daughter (Kim Richards) and now the gang are out for revenge themselves at any price. Bishop's police station is under siege but he lacks manpower. Can he trust those guys in the cells?
The siege is a thrilling battle for survival, the gang members are portrayed as a faceless and relentless army. The film is basically an old school Western or war film set in the modern city with a wave of "savages" mowed down by a small group of heroes. The film is violent and frequently dark, the senseless gunning down of a little girl buying ice cream for example. The gang's motivations are never explored, they just want to kill and no reason is given but that is one of the things which makes the film all the more scary.