It has been more than two hundred years since Bookholm was destroyed by a devastating fire, as told in Moers's The City of Dreaming Books. Optimus Yarnspinner, hailed as Zamonia's greatest writer, is on vacation in Lindworm Castle when a disturbing message reaches him, and he must return to Bookholm to investigate a mystery. The magnificently rebuilt city has once again become a metropolis of storytelling and the book trade. Yarnspinner encounters old friends and new denizens of the city-and the shadowy 'Invisible Theater.