The universe is under attack. Planets are destroyed, galaxies become nothing more than stars, and beings from outer space have no choice but to flee. Quite by accident, they all come to Earth. Two of them don't want to be found. One of them had no choice. One trusted Earth enough to seek out help. Liam, who lives on Earth, manages to befriend the new residents and convinces them to come to a safe military base. The national guard monitors them, eventually sending them on missions to fight against terrorists. Traveling around the world they find out that the enemy isn't at all what they expected. And they soon realize that the real problem is much worse than anyone ever thought.