The villainous badgers have escaped from prison, and it's up to Stinkbomb and Ketchup-Face to find them and put them back! Only someone who knows about stories can point them in the right direction, so they consult Miss Butterworth, the Ninja Librarian.

After referring to a copy of Stinkbomb and Ketchup-Face and the Quest for the Magic Porcupine, Miss Butterworth sends them on their quest. Along the way they encounter raccoons who are definitely NOT badgers in disguise, a really REALLY long traffic light, a rabbit in a prickly coat, and a banana-eating hammerhead shark, all leading to a showdown with the badgers. Can the kids think fast enough to save the king from being shot out of the biggest water rocket in the world?