In a post-apocalyptic South Korea, a soldier is recruited to retrieve a truck filled with money from a zombie-infested peninsula. Teaming up with survivors, they must fight the hordes of zombies and navigate dangerous obstacles to make it out alive.

A truck driver accidentally runs over an infected deer, causing a zombie virus to spread. Seok-Woo, a fund manager, takes his daughter Su-an on a train to Busan. As the train leaves, a zombie boards and begins infecting passengers. Seok-Woo, Su-an, and a group of survivors fight their way through the train, facing challenges and sacrifices. They eventually reach Busan, but must cross zombie-filled tracks to safety.