It was after midnight in 1990, and a group of NASA technicians are playing chess in the lounge. They never notice the soft clicking noises as radiation detectors kick in and a strange code begins taking over a computer monitor. As a glowing saucer zips past the Voyager, locks itself into orbit around Neptune, rolls over, and then disappears from view, the technicians loudly argue over the rules of the game-unaware that aliens are headed toward Earth.

Unfortunately, the amphibian-like creatures-who reproduce in alarming numbers-have made a serious mistake. They have chosen a small town in Iowa as the place to launch their invasion, mistakenly thinking they can attack under a cloak of invisibility. But this rural setting is protected by the Pirates, an elite team of adventurers and foilers of evil plots comprised of the most dangerous creatures on planet Earth-young boys. As the alien invaders kidnap one of the pirates and begin to examine him for weaknesses, they have no idea that they have in their possession the girl-hating, chaos-creating nuisance that is the bane of all fourth-grade math teachers in town.

It may be the last mistake they'll ever make.