Thor: In 970 A.D., Odin (Anthony Hopkins), king of Asgard, wages war against the Frost Giants of Jotunheim and their leader Laufey (Colm Feore), to prevent them conquering the Nine Realms, starting with Earth. The Asgardian warriors defeat the Frost Giants and seize the source of their power, the Casket of Ancient Winters. In the present, Odin's son Thor (Chris Hemsworth) prepares to ascend to the throne of Asgard as King but is interrupted when the Frost Giants attempt to retrieve the Casket.