Lanfeust and her four wives can finally give to the Magohamoth the spice that will regenerate the animal of magic. But they are joined by Lylth, the devourer of worlds, who always hunts the fabulous beast on board of an armada where she has had all the inhabitants of Eckmül board. Among them, Hebus the troll and some wise of the conservatory, who are the only ones not to be hypnotized by the goddess. Lanfeust, disguised, will join Hebus but it is in the middle of a mysterious continent of seaweeds and its inhabitants that this episode will end...