It wasn't until the year 2020 that the shadow government finally realized that the people had the real power the people behind the curtain wanted total control. So they took extreme measures. The NGS-1 (nano-gas-spreaders) would strike the earth with great force. you would hear the boom and you would know you had minutes to get out of your bed (they came mostly at night). Biological warfare was declared on the world by a hand full of evil men. The green gas spread by these machines turned its victims to violent mindless zombie bent on killing and eating their prey. Grave, the best bounty hunter in the land takes on the task to locate and destroy these threats. His only contact is his partner Phil who sends him messages through a primitive form of text messaging. All the people fled to safe houses and underground dwellings waiting for the day of his victory.