In the murky twilight of a southern Arizona town, lurks the legend of a creature the locals call El Chupacabras, the "goat sucker". More frightening than it's tendency to prey on goats, draining them of their blood, however, is its new found interest in humans. As a modern day gold prospector seeks to find what he believes to be a lost gold mine, the old man who became a hero to the townsfolk years before when he hunted down what they thought was a vampire, knows the mine is actually the lair of a blood sucking monster, either vampire, or perhaps, a creature from outer space.