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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 Asgardian warriors defeat the Frost Giants in Tønsberg, Norway,
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. For Thor's arrogance, Odin strips his son of his
godly power and exiles 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 finds Mjolnir, 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. Thor, having discovered Mjölnir's nearby
location, seeks to retrieve it from the facility that S.H.I.E.L.D. has
constructed, but he finds himself unable to lift it 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 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 defeats them, prompting Thor to offer himself instead. Struck
by the Destroyer and near death, Thor proves himself worthy by his
sacrifice to wield Mjölnir. The hammer returns to him, restoring his
powers and enabling him to defeat the Destroyer. Kissing Foster goodbye
and vowing to return, 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, stranding
himself in Asgard. Odin awakens and prevents the brothers from falling
into the abyss created in the wake of the bridge's destruction, but Loki
allows himself to fall when Odin rejects his pleas for approval. Loki ends
up falling into a wormhole and arrives at Earth. Thor makes amends with
Odin, admitting he is not ready to be king; 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. An invisible Loki prompts
Selvig to agree. |
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