Joong-ho is a dirty detective turned pimp, who's in financial trouble as several of his girls have recently disappeared without clearing their debts. While trying to track them down, he finds a clue that the vanished girls were all called up by the same client, whom one of his girls is meeting with right now.

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.

Two spies share a secret bond, despite their loyalties. A North Korean assassin is sent to Seoul to kill a dissident, but instead he teams up with a South Korean agent in search for revenge.

Changsu does not have any family, friends or lover living in prison as a substitute prisoner for the others. After 3 years in prison, he came back to his normal life with gambling and drinking. One day, Miyeon, appears to him, and everything changes. She enlightens his life for the first time. Changsu bets his everything to save this woman for the first, and for the last time in his life.