墨西哥華雷斯城作為美國的「後院」，接連發生姦殺案，數以百計女工遇害，光天化日被棄屍荒野，兇徒一直逍遙法外。跨國企業只知剝削廉價女工，警界貪贓枉法，政府罔顧人命，惡勢力橫行，只有社區組織與民間電台發出微弱的抗議聲音。女幹探…

A masked singer that also robs banks is interrogated, during the interrogation shows how he became who he is.