Park Joo-suk

Due to sudden deteriorating weather conditions, visibility on the Airport Bridge is severely impaired, leaving people stranded and at risk of the bridge collapsing due to a series of chain collisions and explosions. Amidst the chaos, the canine subjects "Echo" from the military experiment "Project Silence," who were being transported in secret, break free, and all human survivors become targets of relentless attacks.

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.

After being kidnapped as a small child and raised by the five men who abducted him, a teenage boy is now forced to join their life in crime.