Jason Shaw is a member of the Colonial Militia, dedicated to protecting Earth and its colonies from pirates and hostile aliens.

Jason spends as much time hutning down his next sexual conquest as he does training for combat. After a successful anti-piracy operation, he and his fellow squaddies are assigned to a research station on one of Saturn's moons. Travelling to Titan, they rapidly become entangled with corporate corruption from the bureaucrats in charge. When natural disaster strikes and a hostile alien lifeform begins a rampage, Jason has to decided between his squad-mates and his current lover. All in a day's work for a Colonial Marine.