In a post-apocalyptic future where the Earth is overrun by flesh-eating ghouls, humanity has retreated into fortified city-states. Fiddler’s Green is one such vertical haven, a luxurious walled enclosure run by the ruthless and affluent entrepreneur Paul Kaufman. While the elite live in opulent skyscrapers enjoying the remnants of the old world, the underclass struggles for survival in the squalid slums outside the steel walls, governed by ruthless warlords and constant dread.Riley Denbo is a disillusioned master builder of the "Dead Reckoning," a heavily armored, all-terrain scavenging vehicle used to run supply missions into the zombie-infested territories. Desperate to escape this grim existence and migrate north to Canada, Riley plans his final run alongside his loyal partner, Charlie, and a fierce, scarred survivor named Slack, whom they rescued from a brutal gladiatorial arena.Meanwhile, outside the city gates, an
intelligent zombie known as "Big Daddy" begins to organize the undead masses. No longer driven solely by mindless hunger, Big Daddy learns to use tools, wield weapons, and lead his decomposing brethren in a coordinated uprising against the living.Tensions in Fiddler’s Green reach a boiling point when Cholo DeMora, Kaufman’s ambitious right-hand man, is denied a luxury condo in the high-rises despite years of loyal dirty work. In
retaliation, Cholo hijacks the Dead Reckoning, turning its massive artillery cannons toward Fiddler’s Green and holding Kaufman hostage for his deeds and wealth.Riley and Slack are coerced by Kaufman into tracking down Cholo and the vehicle before it destroys the city’s economic heart. However, the mission is complicated when Big Daddy leads the massive zombie horde directly across the electrified rivers toward the seemingly impenetrable walls. The city's defenses fail because the dead are smarter than anticipated, walking straight through the water which shorts out the perimeter's electric current.Chaos erupts as the undead breach Fiddler’s Green, slaughtering the panic-stricken upper class who realize their wealth is useless against the relentless horde. Riley catches up with Cholo, but instead of executing him, Riley convinces him to let go of his petty vengeance against Kaufman. Tragically, Cholo is bitten and transforms, forcing Riley to put him down.Kaufman attempts to escape with suitcases full of stolen cash, but his greed ultimately seals his doom, leaving him trapped with the ghouls. Riley, Slack, and Charlie successfully navigate the burning city and drive the Dead Reckoning to safety, choosing to leave the ruined class-divided metropolis behind. As they watch Big Daddy and his followers wander away into the open countryside—seeking only a place of their own rather than continuing their assault—Riley realizes that the living and the dead must learn to coexist in this harsh new world.