In Australia, an elderly couple with an interest in astronomy spots an unexpected comet, soon dubbed Henwood 1. Theres a bit of panic but not much as the comet is expected to miss Earth. Instead, it smashes into the moon and vaporizes. But when it dissolves, it emits a pathogen that travels to Earth and infects the population.

Den is a Viet Nam veteran, changed by what he saw as a sniper and helicopter pilot in the war. As people begin to die around him, he struggles to survive-at any cost. The Australian Parliamentary tries to ensure that a democratic system endures as a Justice...