Based on the Naver webtoon Now at Our School by Joo Dong-geun, All of Us Are Dead tells the story of those isolated in a high school where a zombie virus has been spread and those who are trying to save them.
A student in the school lab invites the audience to find out more about the virus that creates total chaos but accidentally spreads among the students. A high school becomes ground zero for a zombie virus outbreak. Trapped students must fight their way out or turn into one of the rabid infected.