When a ship carrying an Alien brood crashes into Darkseid's domain, he breeds a new horror to unleash upon the homeworld of the New Gods. Superman, visiting super-powered friends on New Genesis, must once again face the threat of the near-unstoppable Aliens when a hideous Parademon army- impregnated with Aliens- launches a merciless surprise attack on the otherwise peaceful planet. Dozens of super-beings rally to protect a world now covered with infected Parademons about to burst. Darkseid's horde is bad enough, but how deadly will their Alien spawn be?