Wilbur Walsh (Bud Spencer) has few thoughts other than how to fill his giant stomach with hamburgers. In order to get them, he will sometimes even resort to working. Matt Kirby (Terence Hill) on the other hand is a good looking cocky character never short of words and ideas. The two have practically nothing in common other than their dislike of all forms of oppression and their somewhat dubious sense of right and wrong. Jobless and broke, Matt decides they should rob a local supermarket, but their venture into crime is far from successful. They burst in to what appears to be the back of the shop only to find themselves in the local Police Recruiting Office. To escape arrest they pretend that the purpose of their surprise visit is to join up, and so two unwilling recruits enter the local force...