Penn Jillette and Teller are called upon to display their unique brand of humor to save civilization from strange extraterrestrial beings who have invaded Earth and who, disgruntled and bored with the mundane nature of human life, threaten to blow up the planet unless someone gives them a good reason not to.

Monsters send their kids to summer camp in this children's cartoon. Dracula, the Frankenstein monster, Wolfman, the Mummy, the Wicked Witch, and others send their kids to Camp Mini-Mon. Two human kids also come to camp, and teach the monsters about "normal" life.