As the daughter of Odin, King of the Norse gods, Thora will soon inherit the throne of Asgard from her aging father. However, on the day that she is to be crowned, Thora reacts with brutality when the gods enemies, the Frost Giants, enter the palace in violation of their treaty. As punishment, Odin banishes Thora to Earth. While Loki, Thor's sister, plots mischief in Asgard, Thora, now stripped of her powers, faces her greatest threat.