Copperhead

When he arrives gunfighter Wild Bill Longley in the rough mining town of Magdalena in New Mexico, discovers that his friend has been murdered by a ruthless gang of outlaws, who camped in the town and terrorizes the local residents. Wild Bill decides his friend for revenge, but suddenly something incredible happens! After the mining explosion at the earth swarm thousands of small poisonous snakes and crawls through the city streets... Save who you can!