A middle-aged man dealing with both unemployment and divorce, William Foster (Michael Douglas) is having a bad day. When his car breaks down on a Los Angeles highway, he leaves his vehicle and begins a trek across the city to attend his daughter's birthday party. As he makes his way through the urban landscape, William's frustration and bitterness become more evident, resulting in violent encounters with various people, including a vengeful gang and a dutiful veteran cop (Robert Duvall).
Nazi skinheads in Melbourne take out their anger on local Vietnamese, who are seen as threatening racial purity. Finally the Vietnamese have had enough and confront the skinheads in an all-out confrontation, sending the skinheads running. A woman who is prone to epileptic seizures joins the skins' merry band, and helps them on their run from justice, but is her affliction also a sign of impurity?