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.
A case of the flu quickly morphs into a pandemic. As the death toll mounts and the living panic, the government plans extreme measures to contain it.
Dong-chul and Ji-soo are a happily married couple. One day, Dong-chul comes home to find his house in disarray and his wife missing.