Kyle, Stan and Cartman's mother plot to give them all the chickenpox by sending them over to Kenny's for a sleepover. Over at the McKormick's the boys feel ashamed for Kenny living in a crap shack but still spend the night there. Both Stan and Cartman breakout, but Kyle remains immune. Kyle is sent back to Kenny's along with his mother who actually wants Gerald and Kenny's dad to get back to being friends after they were separated based on jealousy. Kyle discovers "the parental conspiracy", and with the other boys, they hire a prostitute to give their parent's herpes. Meanwhile, the men don't get along but after reading Kyle's essay, Gerald believes that he was cold to Mr. McKormick and reconciles with him.
Kenny dies from the chickenpox.