Three best friends band together to defend their valuable mining company from monstrous aliens looking to plunder and exterminate.

　　故事講述求生專家柏特蓋默受雇到南非獵補兇猛的食人野獸，他有夥伴崔維斯威克的協助，將與怪獸開展一場生死對決大戰，然而這些受到進化影響的怪獸，完全超乎他們原先的想像。