Kevin, Tara, Warner and TJ are back after Galaxy's Most Wanted, and are dealing with the aftermath of Mim, the fuzzy purple alien that wanted to take over the Earth. Kevin has accidentally miniaturized Klyk, the cyborg space cop, but that is the least of his problems when a space ship descends on Northwest Horizons camp with a freeze ray! Zouric, a Gastropod, and Nuzz, a brain bot, are there with a variety of lizard aliens called Kamilions. They are angry at Mim for messing up, and are trying to get things in order to take over. They have nanobots that attack people and turn them into brainless zombies willing to do their bidding. Kevin and his gang manage to escape the initial attack at camp and make their way across the lake to a soccer camp, but the nanobots turn the soccer players against them. Luckily, before that happens, they meet a goalie, Marcy, who tells them that the creatures sound a lot like something she's read in a comic book by Max Greyson. The group manages to take Klyk's space ship to Colorado to hunt down the author. They find that he's been missing, but talk to his assistant. This gives them a little more information to fight the aliens. They manage to create armor against the nanobots and head back for a final showdown with the aliens. Can they save the camp and, if necessary, the world?