在墨西哥解放运动高潮中,一个神秘的美国青年加入到乔吉领导的一支掠夺队伍,与反叛的将军连续使用暴力掠夺作战枪支。当这个外国青年达到自己冷漠的目的时,乔却发现军队需要的不是所谓的武器,而是整个国家的贫穷及富人的暴行。真正的自由仅仅能用武器来换得吗?El Chuncho's bandits rob arms from a train, intending to sell the weapons to Elias' revolutionaries. They are helped by one of the passengers, Bill Tate, and allow him to join them, unaware he is an assassin working for the Mexican government.