12 years have passed. Lanfeust has resumed his profession as a blacksmith and offers his services from village to village. Under this cover, he is in fact an agent in the service of the Conservatoire of Eckmül... Nothing goes any further in the world of Troy. The wise men, relays of magic, disappear one by one. Lanfeust himself has lost his power. Who is this megalomaniac being who plunges cities and villages into chaos? And what about this gigantic tree from which seems to come all the evils that afflict them? Lanfeust and Hebus, reunited, go to Delpont to investigate these strange disappearances...