Once upon a time, the warriors of Asgard fought the Dark Elves. Millions of years later, Jane Foster discovers the Aether, the Dark Elves' ultimate weapon which was crucial to winning the war between Asgard before it was buried underground, and becomes its host. So it's up to Thor to help her before the Dark Elves return. But while Thor's away, a certain God of Mischief decides to return.
