In the near future, an experiment in Nano technology has gone horribly wrong and a bio-engineered virus threatens to take over the world! You are selected to pilot through 15 levels of twisted, putrefied mutants in an effort to cleanse the planet of the rapidly reproducing virus. Oh, and by the way, you have a bomb strapped to your body that has a short fuse. It's a desperate race against time as you deploy flame throwers, disruptors and homing missiles to wipe out the virus before the world is mutated forever.