The series takes place in the fictional South Korean school, Hyosan High School, where a zombie outbreak suddenly occurs. The story follows a group of students, including the main characters, such as Park Nam-ra (played by Yoon Chan-young), Choi Yi-chan (played by Choi Jung-hyun), and others, as they fight for survival.

If you haven't watched the series, proceed with caution, as I'll be discussing key plot points.

I'm assuming you're referring to the popular South Korean zombie apocalypse television series "All of Us Are Dead." The show, directed by Kim Jin-seon and based on the webtoon "Now at Our School" by Lee Eun-sung, has gained international recognition for its gripping storyline, well-developed characters, and intense action sequences.