In Mexico, the determined federal agent Machete Cortez opposes to the order of his chief and drives with his partner to the hideout of the drug lord Rogelio Torrez to rescue an abducted witness against the gangster. However, he finds the witness naked on the bed but he is surprisingly betrayed by the woman, and his wife and daughter are murdered by Torrez. Three years later, Machete is an illegal immigrant in Texas that wanders on the streets seeking job in the Day Labor Site. He is hired by Michael Booth to assassinate the boasting right-winged Senator John McLaughlin, who is against the immigrants and defends the construction of an electrified fence along the border with Mexico. Machete receives one hundred and fifty thousand dollars for the assignment, but he gives the money to Luz, a Mexican woman that sells taco in her truck and manages the underground Network that assists illegal Mexicans and helped Machete three years ago. When Machete is ready as a sniper in a tower, he finds that he has been betrayed and set up by Booth, who actually is McLaughlin's adviser and plotted the scheme to improve the statistics with the sympathy of the electors to McLaughlin. Once again Machete survives and discovers that Booth supports the vigilantes led by the cruel Von Jackson and is associated to Torrez. Now Machete seeks revenge against his enemies and becomes a myth.—Claudio Carvalho, Rio de Janeiro, Brazil