American crime lord Moco has set up a lucrative business in Mexico. He tries to rub out his imprisoned employee Azul. However, Azul overcomes the hit-men and escapes, determined to get his revenge. Meanwhile, a wandering mariachi comes to the same town looking for work. As Azul's trademark is his guitar case filled with weapons, the Mariachi is mistaken for him and finds himself a hunted man. Everyone looking for him likes to shoot first and ask questions later, so correcting the misunderstanding will not be easy.