They have returned.
An anonymous hacker declares Boxford High ground zero for the next outbreak. When the school holds a corporate-sponsored fundraiser, the infection begins. Again.
Infiltrating the new state-of-the-art school as teachers, the survivors find the world of education is just as dangerous as flesh eating zombies. As they uncover clues to the origin of the outbreak, they fear zombies aren't the worst of what stalks the halls.
Now the original class must ally themselves a new generation of zombie-savvy students. In this final showdown, can they survive a school overrun with undead or will an evil corporation unleash the zombie apocalypse on the world?