Thwarted in their efforts to secure dates for the upcoming high school prom, Steve and Snot turn to the CIA's cloning machine to churn out two willing ladies. But, when the device produces two uber-fast-growing newborn babies, the boys must break out their fathering skills to ready them in time for prom night. Meanwhile, Stan takes home the CIA's cloned pet, Daren the Dodo, with disastrous consequences.

Steve is eager to prove that he's no longer a little boy, so he sets off to prove his manhood by joining Stan, Bullock and the rest of the CIA on their annual hunting trip. Meanwhile, Roger and Klaus set off on a cross-country road trip.