Thor’svillainousuncleLokihasescapedAsgardtosearchforYggdrasil-TheTreeoftheNineRealms.ThetreeholdsthepoweroftheUniverseandishiddenawayonEarth.WiththehelpofgiantwolfgodFenrir,Lokiplanstodestroythetreeandreplantitinhisimage,givinghimdominionoverall.NowThormustfollowLokitoEarthtowageanepicbattlethatwillholdthetwoworldsinitsbalance.

一组科学家必须与时间赛跑，以阻止一系列似乎预示着可能的灾难的全球性灾难。