In a world where a deadly virus begins to unleash chaos, a group of passengers boards a train departing from Seoul to Busan, the only city in South Korea that seems to be safe from the outbreak. Among them is a separated father, who is struggling to reunite with his young daughter, and a group of people who, in the midst of the crisis, will have to confront not only the hordes of infected but also the human tensions that arise in extreme situations.
As the train moves forward, the situation becomes unsustainable, and the passengers must face heart-wrenching decisions: is it more important to save a stranger or a loved one? While survival skills are put to the test, panic and despair ensue, but moments of heroism and sacrifice also emerge. The struggle for survival becomes a metaphor for human connection and courage in times of crisis.
The protagonists, on a journey that turns into a true emotional rollercoaster, discover the importance of empathy, solidarity, and sacrifice, even when hope seems to fade away. As the story unfolds, the train becomes the last refuge, and each stop could mean the difference between life and death. With a relentless pace, this horror thriller makes us question how far we would be willing to go to save those we love.