In a secluded research facility hidden within a dense forest, a reckless scientist's experiments with reanimation take a disastrous turn. The project, initially intended to revive the dead as a means to boost the workforce, spirals out of control when the test subjects become vicious, flesh-eating zombies. Amidst the chaos, a group of unsuspecting civilians wanders into the compound, having been misled by rumors of free medical care. Dr. Selma, the head scientist, struggles to contain her horrific creations and to find a cure while her underlings are overwhelmed by the undead outbreak. The remaining staff and visitors are forced to band together to survive, realizing that escape is their only option as the facility descends into madness.

As the unlikely allies navigate the darkened corridors, they encounter various traps set by the security system meant to quarantine outbreaks. Tensions rise between the group members, each with their secrets and hidden agendas, further complicating their desperate quest for survival. The team forms uneasy alliances, learning to trust one another and overcome internal conflicts. Their journey takes them through areas filled with lurking zombies, leading to hair-raising confrontations and narrow escapes. With time running out and hope dwindling, they must find a way past the undead horrors while confronting the treacherous facility's machinations. As day turns into night, their tenuous unity and resourcefulness are continually tested in this high-stakes battle against an unstoppable army of the undead.