Petroleum engineers drilling in the African desert uncover a pocket of mysterious, life-preserving gas, and the hellish creatures hibernating within-a colony of ten-foot prehistoric scorpions. After 400 million years, Scorpius Rex has risen to reclaim its throne as Earth's apex predator. A humanitarian mission gone awry traps Dave Brank's security team inside the drilling complex's electrified perimeter, locked in a life or death battle against hordes of flesh-eating scorpions. Brank, a decorated soldier unjustly drummed out of the army, is determined to save his men and the neighboring village. But outside the fence lurks another kind of monster-renegade commandos with a barbaric plan to lure the scorpions out . . . by feeding them women and children. Only Brank's team can stop the slaughter and, just maybe, save the world. Unfortunately, these aren't elite Delta Force Operators; they're mercenaries-battle-scarred mavericks who kill for a paycheck, not to save mankind. But with humanity's survival at stake and Brank calling the shots, even these hired guns can become heroes.