The movie concerns hundreds of little spiders that are exposed to toxic waste, causing them to grow to gigantic proportions and begin killing and harvesting. When the alarm is sounded, it is up to mining engineer Chris McCormack and Sheriff Sam Parker to mobilize an eclectic group of townspeople, including the Sheriff's young son, Mike, her daughter, Ashley and a paranoid radio announcer named Harlan to battle the bloodthirsty eight-legged beasts.