The most important group in the history of mariachi music is Mariachi Vargas de Tecalitlán, founded in 1898 by Gaspar Vargas in Tecalitlán, Jalisco.

The style of music that would become Mariachi arose in the Jalisco region of Mexico, and was also called son jaliscience.

Synopsis. In a small Mexican town, a ruthless criminal, nicknamed Azul, breaks out of jail and vows revenge on the local drug lord, Moco, who put him there in the first place, by using a guitar case which carries a small arsenal of guns.

The film was shot in numerous locations in Ciudad Acuña, Coahuila, located in Northeastern Mexico adjacent to Del Rio, Texas.