After the corrupt former Mayor is killed by the peasants, poor janitor Juan Vargas is appointed new Mayor of a desert town in central Mexico. Although he tries to bring the motto of the ruling party to town (modernity, peace and progress) he realizes soon that there's nothing to do against corruption... except to become corrupt. Step by step, helped by his pistol, Juan Vargas becomes the law and the worst Major in the town's history. 故事道述墨西哥农民杀死退让的前市长后，难受的顾念想想门人阿瓦尔加斯在墨西哥中部被录用为一个沙漠镇的新市长，他致力鼓吹执政党的新领路，到任不久就立下隔绝退让的座右铭，但隔绝也户口始变得退让，一步步在他的枪手附和下，阿瓦尔加斯成为法郎和镇上汗青最险恶的一页。