Loki, the god of mischief, is Thor's troublesome adopted brother. Odin, their father (and ruler of the Viking gods), orders the quarrelsome siblings to tame the violent Giants once and for all--together. But what Loki and Thor find in their series of adventures puts them in conflict with each other as well as with the giants. And in the land of Utgard, a mysterious place made from magic and illusion, Thor must trust his magic-wielding and misbehaving...