Being the dumbest kid she knows never slows Beatrix Flannery down. When Bean-Tek Industries begins to entice kids, including some of Bea's otherwise very smart friends, into joining its "Bean-Tek Kids" club, with alarming results, Bea is ready to take action. Is Hiram Scalmo, head of Bean-Tek really using the wily koohoo plant in his products? Bea is certain that Bean-Tek can't be trusted. Can she trust koohoo, or would that be making a hasty assumption?