Abandoned for more than 30 years, "D4" remains the focus of conspiracy theory. A wealthy doctor who believes her son is being held somewhere in the long deserted government acreage spares no expense securing a team of Special Ops mercenaries to search him out. But, once inside, they discover there is someone, or something, still inhabiting "D4". Things are not what they seem and what was meant to be a simple search and rescue soon turns into an action packed fight for survival.