Thousands of years ago, a group of Dark Elves tried to plunge the world into darkness by using a weapon known as the Aether.
Warriors were able to stop the Dark Elves but not before their leader could escape. Thor and Loki must come together to save the universe from the leader of the Dark Elves and the rediscovered Aether.
I strongly suggest that you watch the original "Thor" before seeing this sequel. I thought it was a great, action-filled movie but it is very confusing if you do not know the story line. It is a good movie to see if you just want to go out and enjoy yourself.