A little girl stumbles, drops her ice-cream cone, and gives a frustrated cry, despite the narrator's warning to "Never, EVER shout in a zoo-/because if you do-/anything might happen."

Before long, the hapless heroine is being pursued by a scary bear, a moose on the loose, escaped apes, and an ever-growing menagerie of other animals. Released from tanks and cages, the creatures exact their revenge and gleefully surround the child, locking her (and some other humans) in a pen. The last page shows the girl, who is now standing next to an exhibit of a frozen dinosaur, stifling another shout.