After Kenny's semi-permanent death near the end of Season 5, Butters became the replacement Kenny, until this episode, where he is fired for simply being too lame. Stan, Kyle and Cartman hold a competition to find a new fourth friend while Butters, feeling rejected and angry at the world, creates an alternate personality, Professor Chaos, and sets off to spread discord among the world. He does minor things like swapping two soup meals at a Bennigan's restaurant, and stealing erasers from Ms. Choksondik during class.