Lewis Barnavelt is back! And this time, our lovable underdog/hero has stumbled upon something more powerful than even his overactive imagination can dream up. A camping trip with his Scout troop leads Lewis straight to an old grave and a mysterious, magical whistle. When Lewis discovers that this whistle has the power to stop the boys who insist upon bullying him, he is left with a tough decision. Does he continue to use the whistle, which he suspects...