Synopsis: A dream..., a strange and powerful dream that plunges the scientist into a world of horrors as real as her own universe... A man... A creature..., hideous, and that pursues her endlessly. The impenetrable and dark jungle... and then the viscous web, the immense web of mist. The trap that closes... His world... Xaltaïr..., the elliptical. An off-center world, far from the trepidations of a universe taken by madness whose chronicles report the antics of the human junta at grips with its creatures. When Isys has to take the road to Thanaos, the mythical forest in which live the frightening Arachnees-Men, she thinks she won't come back. Even before the members of the expedition reach the base camp, in the heart of these inviolate spaces, contact is already established with the one who is called the Great Arachnee or the Demiurge of the race.