Mariachi plunges headfirst into the dark border underworld when he follows a trail of blood to the last of the infamous Mexican drug lords, Bucho, for an action-packed, bullet-riddled showdown. With the help of his best friend and a beautiful bookstore owner, the Mariachi tracks Bucho, takes on his army of desperados, and leaves a trail of blood of his own. Former musician and gunslinger El Mariachi arrives at a small Mexican border town after being away for a long time. His past quickly catches up with him and he soon gets entangled with the local drug kingpin Bucho and his gang.