My name is Seok-woo and I have a little daughter who is 6 years old. Her mother and I are divorced. Today is my daughter's birthday. We were on the train to Busan and the zombie virus had spread. Gathering with people, but one of the selfish and arrogant people closed the door on us, fearing for themselves that we might be infected. Seok-woo: open the door Joon: no i won't, who know that you're infected or not