Watch Desperado for Free: How to Stream the Movie Online at 123Movies. . El 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 friend and a beautiful bookstore owner, El Mariachi tracks Bucho, takes on his army of desperados, and leaves his own trail of blood.