As the boys head to Mabel Cartman's Residence to spend the holidays, they find a roadside banner advertising a Mr. Hankey meet-and-greet at the mall. After being rejected by the Cartman family, they are offered a ride to the mall from Charlie Manson, who had recently broke out of prison.
However, Kyle discovers that the Mr. Hankey they expected to see is actually a man in a costume, so he decides to remove the actor's costume head out of anger, eventually driving the other kids to rioting and looting.
Meanwhile, Charlie takes along Kenny to record a speech, but stumbles upon a Christmas special based on the Grinch. Being moved by the special, Charlie had his forehead tattoo changed into a smiley face. Upon being discovered by police who were trying to quell the riots, Charlie and the boys quickly make an escape and begin a car chase.