Odin (Anthony Hopkins), long the ruler of Asgard, is about to pass the crown on to his son Thor (Chris Hemsworth) when the ceremony is rudely interrupted by the Frost Giants of Jotunheim. Thor considers this an act of war, and responds accordingly. He does so against his father’s wishes. Odin, angered by his sons’ remorseless and arrogant defiance, strips him of his powers and banishes him to earth. There he is to live as a mere mortal until he proves himself worthy of reclaiming his birth right. As these events transpire, Thor’s brother Loki (Tim Hiddleson) uncovers a secret which will forever alter his relationship to both his father and brother.