In the episode, Cartman, in search of more mature friends, accidentally joins the "North American Man/Boy Love Association" (NAMBLA), and puts all the boys of South Park in jeopardy as a result.
However, they discover that they have raided Dr. Mephesto's group meeting of the North American Marlon Brando Look-Alikes.
Enraged at his failures, Kenny chases Carol through the town and into the NAMBLA hotel with a plunger, attempting to plunge the fetus out of her.
The two plots collide when the Marlon Brando look-alikes and the federal officers arrive at the hotel, and a madcap chase with the boys, both NAMBLAs (one of which are running naked), and the feds ensues.
In the end, all of the North American Man/Boy Love Association members are apprehended by the FBI and the Marlon Brando lookalikes.
They try to weasel their way out of jailtime by giving out a speech equating pedophilia with being an oppressed minority and that they simply cannot help their sexual attraction to young boys.
However, Stan and Kyle retort at this by stating that, while they believe in tolerance and equality for all, pedophiles are criminals who hurt children and should be treated as such.
As the pedophiles are taken away to custody, Cartman backhandedly apologizes to his friends for almost getting them raped, assuring that they will "blossom into maturity" someday.