Earth has fallen to alien invasion. Our final hope lies in two enormous starships carrying both a population for a new world and fleets of attack ships for protection. Embarked on separate journeys, divided by light years of space, desperate to avoid detection, they are alone in the gulfs of space. And on board doubts grow about the mission. Morale is low, there is talk about a loss of a purpose, about betrayal at the highest levels. Is this really the best we can do to escape extinction? Mankind must find new reserves of courage and cooperation, discover new tactics to beat the enemy and, in the end, make sure the enemy is not us.