Ever the wilful rebel, Wolfcub has decided to go all the way to Bag Dahd to find her father Thorgal, when an old friend of the family suddenly pays her a visit: Tjahzi the Dwarf, whose people have just been enslaved by the Dark Elves. Behind this war between the denizens of the other worlds hides a very real threat to humans, for it's the entire celestial order that Lolth, the queen of the Dark Elves, wants to overthrow by going after the sacred tree Yggdrasil ...