Seven years after the events of *Dawn of the Dead*, the zombie apocalypse has consumed the world, leaving civilization in ruins. Once-reliable societal structures have crumbled, and the remaining human survivors are vastly outnumbered by the legions of the undead. In the depths of the Everglades, a small group of scientists and soldiers have taken refuge in a fortified underground missile bunker. The scientists devote their efforts to uncovering a solution to the zombie outbreak, while the soldiers are tasked with ensuring their safety.

Among them are Dr. Sarah Bowman, her partner and soldier Private Miguel Salazar, radio operator Bill McDermott, and helicopter pilot John. Hoping to find others who may have survived, the group takes a mission to Fort Myers. There, they discover nothing but an overwhelming horde of zombies and are forced to retreat back to their base. On their return, they learn that Major Cooper, the commanding officer of the military unit protecting them, has died. 

As tensions rise within the bunker, Sarah grows increasingly worried about Miguel’s deteriorating mental health. Despite her attempts to help him, Miguel succumbs to frustration and anger, ultimately driving Sarah to step back from offering her support.