By genetic engineering, a group of scientists have developed a synthetic, gaseous fuel, called "Biologically Altered Natural Gas", referred to as 'BANG'. After some time, the genetically altered germs escaped from the production sites. A runaway production of BANG ensues, intoxicating the atmosphere around the earth up to an altitude of five to seven thousand feet. To stem the tide of climatic refugees from India and incursions of Chinese troops from the North the elite 'Tiger' troops are mobilized. (Fiction)