Fledgeling Monster Detective Will Allen may have conquered terrifying creatures of all kinds, triumphed over bullies, and even survived his mother's cooking, but now he faces a horror that all of his bravery, cleverness, and skill are powerless against: dealing with GIRLS!

And even if he overcomes that nightmare, can Will rise to the occasion and save his friends from manifestations of their worst fears when his magical monster-fighting tools suddenly lose their special powers?