Deep in the heart of the Australian desert an impenetrable military prison is being invaded by an insidious aggressor. Time is running out for the small defence force who are no match for rotting corpses, giant spiders, voracious sabellids and the other alien beasts that begin appearing around the facility. As the indiscriminate killings continue only the arrival of Colonel Gabriel Drax gives the fractured team any chance of survival. But will this brilliant tactician lead them to safety, or is he too late?