Jimin, Taehyung, and Jungkook are high school students, still navigating their teenage years. Meanwhile, Suga, Jin, J-Hope, and Namjoon are young adults, each preparing for their future careers. They come from modest, middle-class backgrounds and live simple, content lives. However, everything changes one fateful day when a sudden zombie apocalypse erupts across the world.
As chaos spreads, the maknae line finds themselves trapped inside their school, cut off from the outside world. Meanwhile, the hyung line, determined to reunite with the younger members, embarks on a perilous journey to reach them, despite the city being overrun with relentless zombies. With the world falling apart around them, they must rely on their wits, strength, and bonds to survive.