Neutrophil Histolytica, aka Phil, the only amoeba to survive the chemical Holocaust, and Ana Pheles, an orphan mosquito, embark on an adventure to kill the man who annihilated everything they loved. They have to defeat the gargantuan two-legged beast that has an arsenal of chemical weapons. Moreover, it is Phil's last day on Earth. Whatever be the odds, there is no going back from this seemingly impossible mission.