The boys of South Park Elementary are challenged by the girls to a sledding race down Phil Collins Hill to see who the better racers are, and the boys are pretty confident that they are going to win. Cartman gets agitated though when Token makes several references to his weight problem, and when he threatens to throw a rock at him, Kyle takes a jibe at Cartman, who throws a rock at Token. He is sent to Mr. Mackey's office, where he is set two weeks detention. Before they can wrap up though, two FBI agents interrupt, and tell them that the rock throwing incident is automatically being considered a Hate Crime because the victim was black. Cartman goes to court where the media is proclaiming it to be the hate crime trial of the century, and they practically label him a "monster". He is found guilty of committing a Hate Crime, and is sentenced to go to Juvenile Hall until he is 21.
Cartman runs out of the Court Room, and to Kenny's house. Kenny takes him in his Go-Go-Action Bronco battery powered car and they try and flee to Mexico. They are able to avoid police, and even break through a barricade, until the battery power on the car runs out just by the Mexican border. Cartman is taken to Alamosa Maximum Security Juvenile Hall and is assigned to the same cell as a boy nicknamed Romper Stomper.
Meanwhile, the boys replace Cartman with Clyde who is supposedly the second fattest kid in town. They are disheartened to learn that they don't even have enough weight to move. Cartman makes a deal with Romper-Stomper, that if he smuggles in cigarettes, he will tell him how to break out. The boys replace Clyde with a stack of bricks, but the sled spins out of control and the bricks crush Kenny, making the boys team two team members short. They decide they have to bust Cartman out of jail, and put a nail filer in a cake for him to use in the bars on his windows. Their plan falls apart when Cartman informs them that they don't let them take food back to the cells, but they do bring the cigarettes Romper-Stomper wanted.
Kyle and Stan decide to go to Token and try and get him to forgive Cartman for what he did. Cartman at the same time is still acting out his plan, and hides the cigarettes in his ass hole to sneak by the security guard. He craps them out, but flushes them on a reflex, and Romper-Stomper tells him he has to get him a game board. Kyle and Stan learn from Token's dad that getting Token to tell the jail he forgives Cartman will not get him out of prison, and that only the governor can do that. They start to prepare a presentation about Hate Crimes to show the governor. They talk about how hate crimes are hypocritical, saying that all crimes are hate crimes and that punishment shouldn't be any more severe for crimes that involve two different kinds of people or not, because that's discrimination.
The governor say's the proposal makes more sense than any presentation he's heard in years
Cartman is able to sneak in the game board, but discovers Romper-Stomper isn't going to help him out of jail. After Cartman starts to cry, Romper-Stomper decides to help him. Stan, Kyle, and Token's presentation goes over well with the Governor, and they pardon Cartman. Romper-Stomper and Cartman are also able to get out of prison, and go on the run. When Romper-Stomper trips, Cartman goes back to help him and they get captured again, but Cartman is allowed to go free. As a last gift, Romper-Stomper gives him the cups he always walks on.
Cartman makes it in time for the sled race, and after a slow start, Cartman uses Romper-Stompers cups to trip the girls sled. Their sled goes off a cliff, and the boys win the race.
Cartman then returns to visit Romper-Stomper, and craps out Disneyland for him, because that was what Romper-Stomper had always wanted to see.