Wolfcub, Tjahzi and Yasmina have reached the In-between World where Nidhogg, guardian of Yggdrasil, was banished. The girl wants to convince the great serpent to resume his duties and protect the sacred tree from the Dark Elves's onslaught. But Nidhogg may not be the most reliable of potential allies ... The future of Asgard, and the Human world, rests on a little girl, her mother, and perhaps a bird- brained little god!