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.

Most claims for its origin lie in the state of Jalisco but neighboring states of Colima, Nayarit, and Michoacán have also claimed it. However, by the late 19th century, the music was firmly centered in Jalisco. Most legends put the origin of the modern mariachi in the town of Cocula, Jalisco.

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.