D4區是由美國軍隊使用、以測試其最新的武器并保護人民的區域五角大樓確保這種超秘密地區受保護平民的存在盡管采取了所有的預防措施但還是發生了嚴重意外事件美國ZF必須迅速行動決定派遣一個救援雇傭軍矯枉過正由于時間緊迫五角大樓前決定鏟平D4區和該地區所有的人 　　D4 follows a team of special ops mercenaries on a mission to rescue a kidnapped kid believed to be held in an abandoned government facility. Hired by the boy's mother, a wealthy doctor with high reaching influence, all seems to be an easy job. Bu...