《墨西哥往事》是一部由罗伯特·罗德里格兹执导，安东尼奥·班德拉斯、萨尔玛·海耶克、约翰尼·德普主演的动作电影。影片讲述了埃尔·马拉齐（安东尼奥·班德拉斯饰）这位身怀绝技的枪手与阴险狡诈的大毒枭巴瑞罗（威廉姆·达福饰演）之间的生死较量。

埃尔·马拉齐是一位独具拉丁忧郁气质的正义战士，他以演唱为掩护，将自己打扮成西部牛仔的形象，隐藏了自己作为民间英雄的真实身份。在墨西哥荒凉的沙漠中，他是杀人不眨眼的枪手，手握巧布机关的武器，成为了恶人的噩梦。然而，为了摧毁毒枭集团，埃尔·马拉齐也为自己树立了无数敌人，让他过着被众人追杀的亡命生活。在每次的血腥战斗后，埃尔都只能选择离开他乡，独自生活。

而在所有追杀埃尔的势力中，最邪恶的就是大毒枭巴瑞罗。他阴沉的面颊上留着两撇凶悍的小胡子，心狠手辣，杀人如麻。随着地位的稳固，巴瑞罗的野心也愈发膨胀，甚至密谋刺杀墨西哥总统，发动武装暴乱推翻政权。

在形势危急的时候，一位CIA探员桑德兹（约翰尼·德普饰）找到了埃尔，并劝说他复出，一同对抗邪恶的巴瑞罗。随着调查的深入，埃尔逐渐发现，巴瑞罗其实就是曾经毁了他一生的幕后黑手。

El Mariachi is a melancholy hotshot with a penchant for playing the guitar who destroys one after another in Mexico Drug lords and gangsters have made countless enemies because of this. His wife was killed in revenge. Dejected, he decided to wander around with his guitar on his back, and disappeared for a long time in the world.

Now the big drug lord Barori has established his own drug kingdom in Mexico , and even deliberately assassinated the president to overthrow the rule and cause riots. Barrero recruited a lot of capable people, not only General Marquez and agent George, but also a lot of weapons and equipment, which is very dangerous. The CIA agent discovered Barori's conspiracy, and he had no choice but to find El. He knew that El, who was a predator, would not sit idly by. In the end, El agreed to Agent Sanders and took his girlfriend with him. Karena has experienced fatal dangers several times, and El is afraid of losing Karena, so El has no choice but to find two friends to help, and finally the three guitar warriors come back to fight Barrero.