Seok-Woo is a supervisor in Seoul separated from his spouse. She lives along with her daughter Soo-An. Seok-Woo doesn’t spend an excessive amount of time along with his daughter, doesn’t present any signal of affection. Earlier than the night time’s birthday Soo-An insist that it desires to see his mom. Seok-Woo has no selection however to go to Busan to see his mom. The following morning, the 2 climb aboard the KTX prepare that may take them to Busan. Earlier than the prepare leaves the station, a wierd younger entrain. Evidently the younger girl is contaminated with a horrible virus that spreads at a dizzying charge. Seok-Woo Soo-An and different passengers should struggle for survival now.