It's giant man-eating bugs battling humans to the death again ... and the future of civilization hangs in the balance! When earthquakes release a swarm of giant scorpions from a subterranean cavern in Mexico, the oversized arachnids go on a voracious rampage, slaughtering everyone in their way before the Mexican army stops them all ... except the biggest, meanest and hungriest of the deadly invertebrates, which heads straight for Mexico City with a taste for humans.