When a zombie virus pushes Korea into a state of emergency, those trapped on an express train to Busan must fight for their own survival.
Jong-dae and Yong-ki make a living by picking up paper and empty bottles. Both then join different gangster clan and becomes involved in a struggle of political interests over development in Gangnam, Seoul.
Over a 4 day period, a fierce battle takes place between Korean independence militias and imperialist Japanese forces in Manchuria, China. The militia includes a master swordsman and an expert marksman.
