The Mexico Trilogy is a series of films: El Mariachi, Desperado and Once Upon a Time in Mexico, all written, produced and directed by Robert Rodriguez, beginning in 1992 and ending in 2003 and distributed by Columbia Tristar which tell the continuing story of the movies' main character, "El Mariachi".
El Mariachi just wants to play his guitar and carry on the family tradition. Unfortunately, the town he tries to find work in has another visitor, a killer who carries his guns in a guitar case. The drug lord and his henchmen mistake el Mariachi for the killer, Azul, and chase him around town trying to kill him and get his guitar case.
El Mariachi, a musician, arrives in a Mexican town and is mistaken as a hit-man. He runs into trouble with a local drug lord and seeks to avenge the death of his lover.
Hitman "El Mariachi" becomes involved in international espionage involving a psychotic CIA agent and a corrupt Mexican general.