Now that Frolli and his mischiefmates Derli, Mynt, and Rikka have determined what terror was unleashed on the town of Stufford, they've got to do something about it. But with an army of ancient, unfeeling insects lurking beneath the stohv, to whom can they turn? And will it be in time? The four young Rottan team up with the stohvriding crew of the Lysvhal -- led by the eclectic Captain Frybitter -- to rally the denizens of Verden to their cause, both aboveground and below. And all the while, horrors they can only begin to imagine lurk just below their noses...