In 20 years of service on the homicide squad Flatfoot (Bud Spencer) has dealt with robberies, murders, suicides, blackmail and prostitution. All this has been done without the help of firearms, due to the unfortunate accident in his career. Flatfoot relies on his fists, which are as lethal as any weapon. But it is his fists that land him in hot water when he discovers a ring of dealers pushing drugs at young kids. His superiors don't believe him, and he is thrown off the force. He decides to taken action on his own by starting a gang war which makes Chicago in the thirties look like a Sunday school picnic.