the lake, and Peter insists that Evelyn is responsible. The local sheriff, however, attempts to stymie the investigation to prevent any disruption of the pending festival. A distraught Kiersten decides to relax by floating on the lake, but a large hook is thrown in her direction. Meanwhile, Finner and Beverly spend the afternoon together, and become romantic. That night, while the locals hold a contest for who has caught the largest muskie, fisherman Denny Dobkins is stranded on the lake when his boat motor malfunctions. He sounds an emergency horn for help, but is gored by a large fishing hook cast at his abdomen, and pulled into the lake. Shortly after, Beverly goes for a swim alone, and is also attacked with a large hook and dragged beneath the surface. Peter and Ann attempt to locate Kiersten. A ranting and raving Evelyn confronts them, informing them that Bev is also missing. Meanwhile, an intoxicated Finner takes a boat onto the lake, playing music loudly from a boombox. The music, combined with the incessant chirping of cicadas, drives Leudke mad in his nearby bait shop—the sound penetrates through a metal plate in his head, which he had implanted after suffering a brain injury in the Korean War. In a rage, Leudke casts a fishing hook at Finner, and tears off his ear. Finner jumps into the water, but is accosted by a raving Leudke, who dismembers him and grinds his limbs to be used for fishing bait. A panicked, exhausted Kiersten finally returns to the lodge, and tells Peter how she was attacked with a large fish hook, and managed to elude it by swimming to the other end of the lake, where she became lost in the woods. Peter, a music major, eventually surmises that that sound of the cicadas combined with certain musical notes can create what is known as the "Devil's tritone," a frequency that has the ability to drive some people insane. Evelyn suggests that the metal plate in Leudke's head could amplify these sounds, which would become overpowering, a phenomenon he witnessed amongst his fellow veterans. Peter and Evelyn investigate Leudke's shack, where they find jars of human organs. While Peter and Evelyn rush back to the lodge, Ann is attacked by Leudke while sitting alone on a dock playing music, and he manages to capture her and bring her back to his bait shop. She