At small SU An birthday. The girl lives with the father in Seoul and very much wants to go to mother to Busan. On the road it happens unforeseen, and the mysterious virus falls upon the country. Passengers of the train to Busan - the only city which reflected the attacks of a virus - should fight for survival. 442 kilometers in way. Welcome to a board also you remember - in this race to survive insufficiently to remain the person.