Stan, Kyle and Kenny go to Nebraska to spend Christmas with Eric's family. Meanwhile, Charlie Manson escapes from prison with Eric's uncle, and the boys help teach him the true meaning of Christmas.

Kyle thinks his new pet fish is evil after it kills two people in his bedroom. Also, the parallel-universe version of Cartman shows up in South Park, and everyone likes him more than the real Cartman.

When Cartman comes into school singing the new hit song, "Stinky Britches," Chef realizes that the song he wrote 20 years earlier has been stolen.

All of South Park's cows become mesmerized by the town's new Wooden Cow Memorial. Meanwhile, the kids' plan to win a Terence and Philip doll from a carney at the Cow Days festival becomes complicated and dangerous.

Egged on by Wendy, Stan and Kyle start building a tree-house in Stan's backyard with the goal of eventually being able to play Truth or Dare with Wendy and Bebe (who has developed a crush on Kyle)