These walkers are much faster than the walkers in the Walking Dead!

　Shi-woo, a fund manager of a securities company, is a polished and smart man, but he is also a man who values profit over righteousness. His wife breaks up with him, and his daughter, Soo-an, becomes increasingly frustrated with her selfish father and decides to go to Busan to live with her mother. On Soo-Ahn's birthday, Shi-woo takes the time to accompany his daughter on the express train to Busan. At the same time, there are extremely suspicious riots all over the city. The government's efforts to whitewash the situation cannot conceal the fact that zombies are rampant, and even the ignorant passengers of the train are plunged into a hell of panic and despair by the arrival of the unwanted guests. The moment the train starts, an infected person rushes into the carriage, and she soon turns into a corpse and starts a bloody massacre of healthy people as far as the eye can see. Before long, the zombie population exploded geometrically. Shi Yu was forced to fight for survival in the cramped space with the surviving passengers.