Miss Stevens is in Mr. Garrison's class recruiting students for a choir tour called "Getting Gay With Kids". They are going to Central America to help to save the Rainforest. Our boys cause trouble and are sent to the office. Kenny has fallen for one of the girls in the choir, so when Mr. Mackey punishes the boys by forcing them to join the choir, he is the only one who is happy about it. The children are on their way to San Jose, Costa Rica. Kenny meets with Kelly, who starts calling him Lenny, Benny and anything other than his name. Miss Stevens also tells Cartman that she plans on changing him; she's got a lot of work ahead of her. Miss Stevens brings the children to much the President of Costa Rica. The President offers them a tour of the rainforest, but first they do a preview concert. Miss Stevens is dismayed by Kyle's lack of rhythm.
On their tour of the rainforest, the children see the wonders of the rainforest, which Cartman keeps trying to beat. Their tour guide is killed and eaten by a snake. Miss Stevens and the children are on their own. Kelly tells Kenny that she likes him, which is bad for her, because she doesn't want her heart broken. Outside the rainforest, Mr. Mackey wonders what has happened to the choir. In the rainforest, Miss Stevens back is covered by a huge bug. They run into a group of revolutionaries. Miss Stevens tries to entertain the troops. They are going to be sent away, when government troops arrive starting a battle.
Miss Stevens and the children are still wandering around the rainforest. Back in San Jose, the concert is about an hour away from starting. Cartman decides to leave the hippie activist. Cartman finds a crew working on a deforestation project and asks for help. In San Jose, the President stalls for time by telling Polish jokes. Meanwhile Miss Stevens and the remaining children find a group of natives who are intent upon killing them. As they run away the fall victim to quicksand.
The natives pull them out and tie them up. They plan on sacrificing Miss Stevens. Miss Stevens changes her mind and decides the rain forest really sucks, just as Cartman and the construction workers arrive to save the day. Miss Stevens and the children are so happy to be saved that they literally change their tune about the rainforest.
Kenny almost dies when he lies to his girlfriend and is struck by lightning. Ironically she revives him, while all Stan and Kyle can do is say their catchphrase and not define who "they" are.