In the year In 965 A.D., the powerful Frost Giants threatened Earth and pushed her towards a devastating ice age. Mankind valiantly fought the threat and, with the help of the Asgardians -- led by their mighty king Odin (Anthony Hopkins) -- defeated the Frost Giants and restored peace to the universe. With the Frost Giants's source of power safely tucked away deep within Asgard, the threat of war no longer loomed over the universe, and only blatant treachery could once again bring the two sides to the brink of disaster. Years later, with Odin set to elevate his son Thor (Chris Hemsworth) to king of Asgard, the Frost Giants infiltrate Asgard and slaughter several of her finest. Thor, his brother Loki (Tom Hiddleston), and a select group of Asgard's most powerful warriors -- without still-king Odin's blessing -- travel to the Frost Giants's home world of Jotunheim to take them out once and for all. Unable to claim total victory and the Frost Giants unwilling to accept a truce from none other than Odin himself, the Asgardians are whisked away before further blood may be spilled. A furious Odin relinquishes Thor of his powers and sends his now-mortal son into exile on Earth. Fortunately, his mighty hammer, Mjolnir, accompanies him, but has been enchanted so only a man worthy of wielding its strength may carry it. As Thor attempts to accustom himself to his new home and limited powers, he's befriended by an astrophysicist named Jane Foster (Natalie Portman) who learns and experiences more than she's ever dreamed of when Thor's true whereabouts and potential powers are revealed. Now, with shady government spooks on their trail, Thor must prove himself worthy of wielding the universe's most powerful weapon, all the while his home planet of Asgard hangs in the balance as a power struggle threatens the stability of the entire universe.