[1] In the episode, the boys go to Cartman's grandma's house in Nebraska for the holidays but Stan was told by his parents that he cannot go because it's far away from South Park.
Meanwhile Cartman's Uncle Howard and his friend Charlie Manson bust out of prison and cause mayhem and mischief.
Although Randy is okay with it, Sharon still forbids their son to go there and order him to stay with their family for the holidays but he argues with them about it and gets sent to his room without dinner.
Later that night the boys hear someone breaking into the house and discover that it is Uncle Howard and another inmate: Charlie Manson.
Manson arrives at Cartman's grandma's house and together with Uncle Howard proceeds to hold everyone hostage.
Having a change of heart, Manson expresses remorse for his crimes and sings a holiday-special style song.