The adults are concerned for Cartman's health, so they arrange for him to go to fat camp. Once he's there, he arranges for another kid to stand in for him and sneak food into the camp from the school. At the same time, the kid shows that Cartman has been losing weight, but Kyle gets suspicious, as he knows no one gets skinny as quickly as Cartman seems to have done. Meanwhile, Cartman is found out and banned from the camp. The kid is sent in to replace Kenny in the Krazy Kenny show, as Kenny himself seems to have been arrested for ... indecent behavior with Howard Stern