Nighthawk (Stack Pierce) under the orders of the somewhat deranged Marx (Cameron Mitchell) steals a lot of firepower from the state National Guard armoury. These guns are then sold to local gangs who go on bloody murder sprees and robberies.
Federal agent Bryant (Richard Rountree) is tasked with bringing the gun runner to justice (though considering the body count there doesn't seem a great deal of urgency from the authorities). He is helped by Detective Long (Leo Fong) who is still mourning the rape and murder of his wife. Crimes which the gun runners and the gangs were involved with...
There isn't a lot of plot, what plot the film has is mostly there as a flimsy skeleton to hang the frequent violent action set-pieces off. Oh and there is a lot of violence in this film, guns and martial arts and murder. The film is rather shoddily made and hard to follow at times but for what it is, its fine, even pretty good. Just not very subtle.