Cooper thought living at a campground would be cool, but ever since his parents bought the lakeside campground, he's had more chores and less time to explore. Now his ex-friend Roy has chosen him as this summer's bullying target! Cooper's only bright spot this summer is his new friend, Packrat, a guy who carries the world in his coat pockets. When someone dams up the lake and floods the loon nest, it's up to the boys to figure out who, why, and how to stop the culprit!