In this satirical take on Westerns, crafty railroad worker Bart (Cleavon Little) becomes the first black sheriff of Rock Ridge, a frontier town about to be destroyed in order to make way for a new railroad. Initially, the people of Rock Ridge harbor a racial bias toward their new leader. However, they warm to him after realizing that Bart and his perpetually drunk gunfighter friend (Gene Wilder) are the only defense against a wave of thugs sent to rid the town of its population.