This trade paperback chronicles the final chapter in the world of the super-hero team known as StormWatch and plants the seeds for the birth of their successors, the Authority. Based on the popular characters from the Sigourney Weaver movies, the Aliens have selected Earth as their next target. As they infest the planet, the WILDC.A.T.S team is quickly deployed to stop this alien invasion. But caught unaware on their orbiting SkyWatch headquarters, several members of the StormWatch team are massacred by the Aliens. Back on Earth, the WILDC.A.T.S fight to avenge their fallen comrades and save Earth from Alien infestation.