Skaar accidentally triggers Ragnarok and incites the ire of Asgard. Detained by the all-seeing, all-knowing guardian of the Bifrost, Heimdall, the Hulks must save Skaar and battle Thor. Soon the Heroes find they must put aside their differences to fight against Malekith and save the realm.

When the Hulks thwart a villain from attacking a girl in the mall, they unintentionally start an alien invasion Deathlok was sent to stop.