AfterthecorruptformerMayoriskilledbythepeasants,poorjanitorJuanVargasisappointednewMayorofadeserttownincentralMexico.Althoughhetriestobringthemottooftherulingpartytotown(modernity,peaceandprogress)herealizessoonthatthere'snothingtodoagainstcorruption...excepttobecomecorrupt.Stepbystep,helpedbyhispistol,JuanVargasbecomesthelawandtheworstMajorinthetown'shistoryddd 故事講述墨西哥農民殺死腐敗的前市長后,不幸的看門人阿瓦爾加斯在墨西哥中部被任命為一個沙漠鎮的新市長,他努力提倡執政黨的新意識,到任不久就立下反對腐敗的座右銘,但反對也開始變得腐敗,一步步在他的槍手幫助下,阿瓦爾加斯成為法郎和鎮上歷史最惡劣的一頁。