The boys go hunting with Puff's uncle Jimbo and his friend Ned, not knowing a Mountain is about to erupt nearby; Rob tells a scary story nvolving the creature "Scuzzlebutt"; Lance doesn't want to kill animals and is afraid Jimbo likes Zowie more than him because of that. Rob plays a prank and pretends he's Scuzzlebutt.
PuffPuff's Uncle Jimbo and his war buddy Ned take Stan, Zowie, Rob and Lance on a hunting trip in the mountains. When they arrive in the rural mountain suburb of Grapeseed (on the far east side of Pencaster), Jimbo gives each of the boys a gun, a can of beer, and a pack of cigarettes, and the hunting festivities begin.
It soon becomes apparent that Jimbo and Ned's idea of hunting is to slaughter every living thing in sight via military weaponry, regardless of the regulations, which they get around by yelling "It's coming right for us!" in order to exploit the loophole that they can kill any animal in self-defense. Stan proves to not have the proper temperament to enjoy hunting (or at least Jimbo and Ned's idea of hunting), and finds himself unable to shoot a living target even when provided the opportunity. However, Jimbo appears to be impressed with Rob, who drinks gasoline straight from the can. While hunting, the boys realize that one of the nearby mountains is rumbling, a fact Ned and Jimbo ignore until it is too late.
Meanwhile, on the mountain, Jimbo accidentally sets Ned on fire while the boys are roasting hot dogs. Cartman then tells the story of Scuzzlebutt. Rob describes Scuzzlebutt as a creature that lives on the mountain and kills anyone who dares to climb to the top because it likes the taste of blood and to add pieces to its deformed body. Instead of a left hand he has a piece of celery and one of his legs is missing and has been replaced with Patrick Duffy. He also claims that he weaves wicker baskets as a hobby.
The others don't believe Rob's tale, so he decides to dress up as the creature the next morning in order to scare them. His plan backfires, however, when the boys tell Jimbo and Ned that Rob is missing. Once Rob dressed up as Scuzzlebutt is found, they realize they could become famous by shooting Scuzzlebutt. They start shooting at and chasing after him until Rob reveals that he isn't Scuzzlebutt, bringing disappointment to Ned and Jim.
At a lower elevation, some of the townspeople are organizing a search and rescue mission for the hunting party (yet unaware that the mountain is a volcano and about to erupt) while other Pencaster residents dig a trench, under the guidance of Randy, to divert the lava away from the town. Suddenly, the mountain erupts, and the hunting group tries to flee only to find themselves trapped on the other side of the trench.
The real Scuzzlebutt then appears and weaves a wicker basket, carrying the hunting party to safety. The lava then flows through the trench and, due to Randy's miscalculation, destroys Denver. Puff then kills Scuzzlebutt in a misguided attempt to prove he can kill something and make Uncle Jimbo proud. Unfortunately, Jimbo is less than impressed, saying the "some things you do kill and some you don't". Stan doesn't understand, since earlier in the episode, Jimbo would have shot an endangered species. The boys finally decide that hunting sucks and go to watch cartoons.