As viable water is depleted on Earth, a mission is sent to Saturn’s moon Titan to retrieve sustainable H2O reserves from its alien inhabitants. But just as the humans acquire the precious resource, they are attacked by Titan rebels, who don’t trust that the Earthlings will leave in peace.

Thor’s villainous brother Loki has escaped Asgard to search for Yggdrasil — The Tree of the Nine Realms. The tree holds the power of the Universe, and is secreted away on Earth. With the help of giant wolf god Fenrir, Loki plans to destroy the tree and replant it in his image, giving him dominion over all. Now Thor must follow Loki to Earth to wage an epic battle that will hold the two worlds in its balance.