William Foster aka D-Fens is a recently unemployed defense worker who one hot day has eventually had enough with all society and begins to lash out in many different violent and psychotic ways.
His breakdown all stems from being told by his ex-wife that he is not allowed to see his daughter on her birthday, thus leaves his car in a traffic jam and decides to walk around. On this walk he meets many different people and seems to end up in a fight with them for some reason or other. Mainly when he does not get his own way ...