After they ""discover"" Munchy whistling fantastically in the woods, Peanut and Jelly pressure him into performing a whistling concert for the whole town.

"He uses kids as a trampoline!", Flick tells his friends of his vicious cousin, Billy. As if just hearing about him weren't terrifying enough, Flick and the gang are in for a real shock when they learn that Billy will soon be coming to Lake Hoohaw for a visit!