Easter Casket

In 965 AD, Odin, king of Asgard, wages war against the Frost Giants of Jotunheim and their leader Laufey, to prevent them from conquering the Nine Realms, starting with Earth. The Asgardians defeat the Frost Giants and seize the source of their power, the Casket of Ancient Winters. In the present, Odin's son Thor prepares to ascend to the throne of Asgard but is interrupted when Frost Giants, secretly allowed in by his brother Loki, attempt to retrieve the Casket. Against Odin's order, Thor travels to Jotunheim to confront Laufey, accompanied by Loki, childhood friend Sif and the Warriors Three: Volstagg, Fandral, and Hogun. A battle ensues until Odin intervenes to save the Asgardians, destroying the fragile truce between the two races. As punishment for Thor's arrogance, Odin deems his son unworthy and strips his powers before exiling him to Earth as a mortal, accompanied by his hammer Mjölnir, now protected by an enchantment that allows only the worthy to wield it. Thor lands in New Mexico, where astrophysicist Dr. Jane Foster, her assistant Darcy Lewis, and mentor Dr. Erik Selvig find him. The local populace discovers Mjölnir, which S.H.I.E.L.D. agent Phil Coulson soon commandeers before forcibly acquiring Foster's data about the wormhole that delivered Thor to Earth. Having learned about Mjölnir's nearby location, Thor seeks to retrieve it from the facility that S.H.I.E.L.D. has constructed and tries to lift it, but is unable to do so and is captured. With Selvig's help, he is freed and resigns himself to exile on Earth as he develops a romance with Foster. Loki discovers that he is Laufey's biological son, adopted by Odin after the war ended. Loki confronts Odin, who wearily falls into the deep "Odinsleep" to recover his strength. Loki takes the throne in Odin's stead and offers Laufey the chance to kill Odin and retrieve the Casket. Sif and the Warriors Three, unhappy with Loki's rule, attempt to return Thor from exile, convincing Heimdall, gatekeeper of the Bifröst—the means of traveling between worlds—to allow them passage to Earth. Aware and suspicious of their plan, Loki sends the Destroyer, a seemingly indestructible automaton, to pursue them and kill Thor. The warriors find Thor, but the Destroyer attacks and overpowers them, prompting Thor to offer himself instead. Struck by the Destroyer and near death, Thor proves himself worthy to wield Mjölnir. The hammer returns to him, restoring his powers and enabling him to defeat the Destroyer. Thor and Jane kiss each other goodbye before he leaves with his fellow Asgardians to confront Loki. In Asgard, Loki betrays and kills Laufey. Thor arrives, and Loki reveals his plan to destroy Jotunheim with the Bifröst Bridge. Thor fights Loki before destroying the Bifröst Bridge to stop Loki's plan. Odin awakens and prevents the brothers from falling into the abyss created in the wake of the bridge's destruction; when Odin rejects Loki's pleas for approval, Loki allows himself to fall into the abyss. Thor makes amends with Odin, admitting he is not ready to be king and longs to see Jane. Meanwhile, on Earth, Foster and her team search for a way to open a portal to Asgard. In a post-credits scene, Selvig is taken to a S.H.I.E.L.D. facility, where Nick Fury opens a briefcase and asks him to study a mysterious cube-shaped object, which Fury says may hold untold power. 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