The carnage resumes immediately after the events of the first film, following the lone survivor Martin, who is terrorized by the resurrected Nazi zombie Colonel Herzog. In a chaotic escape, Martin crashes his car, and police mistakenly arrest him, suspecting him of murdering his friends. At the hospital, corrupt surgeons inadvertently reattach Herzog’s severed arm to Martin’s body during
emergency surgery, granting him superhuman, necromantic strength. Martin quickly discovers this terrifying new ability when the arm acts with a mind of its own, forcing him to violently dispatch a skeptical
police officer.Fleeing captivity, Martin realizes Herzog’s primary motivation remains unchanged: completing his long-delayed mission to slaughter the inhabitants of the remote Norwegian village of Øksfjord. Desperate to stop the impending massacre, Martin seeks assistance. He connects with "The Zombie Squad," an enthusiastic trio of American geek-enthusiasts—Bobby, Daniel, and Monica—who run a second-rate paranormal museum. Thrilled by the prospect of real-world carnage, the Americans readily join Martin's crusade.Realizing they are hopelessly outnumbered against Herzog’s growing battalion of undead soldiers, Martin learns from a local historian that he can raise his own army to combat the threat. Using his newfound supernatural power, Martin resurrects a battalion of captive, vengeful Soviet prisoners of war who died in the region decades earlier. This sparks an epic, gruesome ideological clash: the Nazi zombies versus the Soviet zombies on the snowy Norwegian landscape.As the two undead armies clash in a brutally hilarious and gory battle that destroys the town, Martin confronts Herzog directly in an old church. Their final confrontation is fierce and visceral. Martin uses his infected arm to match Herzog’s strength, eventually overpowering the tyrannical Colonel. However, the battle takes a bittersweet emotional toll when Martin accidentally kills Hanna, the local woman he has been trying to protect throughout the ordeal.In the aftermath of the massive battle, with the Nazi threat neutralized and the Soviet forces settling their historic scores, Martin cradles Hanna’s lifeless body. Refusing to accept her death, Martin uses the dark necromantic power coursing through his grafted arm to resurrect her. As Hanna gasps back to life, the film concludes with a darkly romantic and bizarre twist, as Martin kisses her amidst the blood-soaked snow, sealing their peculiar undead fate together.