在这部零件片中,在墨西哥，Iván为舅舅Jaime工作，舅舅是汽车零件商，两人都梦想过更好的生活，他们省吃俭用，想在不久之后偷渡到芝加哥。Jaime得知要想偷渡必须付给蛇头更多的钱之后，他决定把外甥带进盗窃汽车零件的圈子里。
Ivan, a 14-year old boy, lives with his uncle Jaime, a mediocre dealer of used car parts. Both of them dream with a better life and are stashing away their money in order to emigrate ilegally to Chicago shortly. When Jaime realizes that he needs much more money than he expected in order to pay the "Coyote" that will help them cross the border, he decides to introduce his nephew into the world of car-part theft. Ivan learns quickly the know-how of his new trade and convinces Efrain, his best friend, to help him. The kids enjoy themselves together and carry out Jaime's orders skilfully until Ivan realizes that his uncle's intentions for the trip have changed since they first made their plans.
