Four years after the outbreak of the terrible virus, which South Korea failed to contain, what remains of the country is under siege, and hordes of zombies roam across the entire peninsula. Former military man Han Jong-seok, who managed to evacuate at the time, sets off from Hong Kong to a restricted zone as part of a small detachment to find a truckload of money. He will have to make his way through a terrifying world where, in addition to the aforementioned threat, people who are staging brutal survival games also pose a danger.