Every day at the Athensville Zoo the peacocks are allowed to wander freely among the visitors, delighting and guiding kids and grownups alike, and kind, curious Plum is the peacock most proud of their responsibility. But Itch the ningbing--a type of very small marsupial--doesn't understand why those birdbrains should get so much freedom while he's all cooped up. So he plots and plots, sure that he will escape and become the zoo ambassador!