Weasel is sent to investigate the world's largest hole. The hole is a tourist attraction, and definitely the only thing to see in the little town its located in. Weasel brings all his equipment with him, to study the hole and discover its true origins. Baboon, on the other hand, is there for another thing. He finally mentions he has a goal in his life, to plug up every hole he finds. Yes, he is there to fill up the world's largest hole with cement. Weasel cautions him by telling him the hole is just too large to be filled with some buckets of cement. Baboon is left to ponder a new way to plug up the world's largest hole.
He finally gets an idea: use an inflatable cork! Meanwhile, Weasel discovers that the hole is not a hole at all, but a ground level volcano (!) and he says it's a good thing Baboon didn't get to plug it up. Right then the inflatable cork lands on top of the hole, and Baboon does his "victory dance" on top of it. The volcano explodes, and Baboon thinking his job there is done, drives away in his car, only to fall off the edge of the world.
A really good episode, although not very much happened.