A workaholic corporate manager boards a high-speed train with his young daughter to reconcile their relationship, only to find themselves trapped in a nightmare as a zombie outbreak sweeps across South Korea. What begins as a simple journey becomes a desperate fight for survival as infected passengers turn the train into a claustrophobic death trap. The film masterfully blends intimate family drama with intense action and horror, exploring themes of redemption and human nature under extreme pressure. With escalating tension and shocking twists, this gripping thriller keeps audiences on edge as characters battle both the undead and their own moral choices.