In 1968, at a military hospital, an infection begins to ripple through the facility as an operating team works on a patient. A medical student secretly pockets a strange vial hidden inside a thermos, hoping to study it later, but is fatally shot while trying to escape through the woods, dropping the mysterious container. The hospital staff scramble to contain the outbreak, enforcing strict consequences on anyone who had contact with the infected man. Outside the building, sharpshooters lay the explosive obstacles that would eventually seal off the hospital, and the ensuing chaos culminates in a dramatic, grim end as the explosives wipe out the lingering threat and the hospital is left quiet—at least for a time.
Thirty-seven years later, a group of patients at the same hospital—[Boris], [Jackie], [Isaac], [Sam], and their doctor, [Donwynn]—stumble upon a buried, peculiar thermos in the yard. The discovery kicks off a dangerous chain of events: [Sam] attempts to pry it open, while [Donwynn] urges caution and entrusts the container to Sam’s care. [Isaac] senses trouble from the moment the thermos appears, and [Jackie] quietly makes a bold move, slipping away with the strange object and retreating to the bathroom to try opening it. The tension in the room rises as the others race to talk him down, attempting to protect everyone from whatever danger lies inside. The moment the thermos is breached, something unseen is released, and a pathogen begins to seep into the group’s lives.
That night, the first signs of trouble surface. Donwynn receives uneasy updates, and the others begin to notice odd changes in themselves. The following day brings a sharper awareness: the group’s skin shows dead, peeling patches, and Emma discovers she is pregnant. As fear grows, Emma attacks Marshall when he presses for answers about her test results, and she bites him, spreading the infection further. [Sam], [Jackie], and [Boris] reveal rapid, horrifying symptoms—rotting flesh, swelling veins, and coughing up blood. Marshall is quarantined as the hospital tightens its grip, and Dr. Heller declares a full lockdown, authorizing armed guards and orders to neutralize any dorm 1 resident who threatens the staff. Donwynn tries to stay connected to the outside world, receiving a warning from a friend about the true danger of the thermos, which allegedly contains a virus capable of mutating human DNA. As the day wears on, Marshall dies from the infection, marking a grim milestone in the outbreak.
The next morning brings a chilling routine to the front desk: patients are offered medicine, but the situation remains dire. [Ava Flores] informs Donwynn that the virus is a flesh-eating illness with a brutal potential for spread. Tensions flare between Patty and [Vicky], and a tense moment is shattered when Patty seizes a handgun from Derber and uses it to breach Emma’s room. In the ensuing chaos, Marshall reanimates and attacks, killing Dr. Heller, who had stopped by to study the progression of the infection. Donwynn witnesses the grim chain of events from a window as the hospital’s security system struggles to keep pace. In the struggle, [Isaac] is wounded but survives a fatal blow, and the group fights to control the situation as Patty shoots through a door to reach Emma’s room. The hospital’s police force eventually puts down the zombified Marshall, but not before the infection spreads further. Donwynn’s friend arrives to share the full truth about the virus: everyone who was infected is technically dead by ordinary standards, and the contagion is extraordinarily dangerous, capable of leaping from person to person. The revelation reframes the entire crisis and shakes the survivors to their core.
As the dawn light grows brighter, the hospital trembles under the weight of the outbreak. [Boris], [Jackie], and [Sam] lose control and transform into zombies, their ferocious hunger turning the dorm into a trap for the remaining survivors. They taunt the living from inside the dorm as the city beyond begins to feel the reach of the catastrophe. Dr. Heller’s reanimation ripples through the halls, and he hunts within the hospital’s rooms, while Charlie—the infected person who had lingered in the shadows—draws the staff’s attention away from other threats. One by one, more patients—including [Emma], who is now in labor—become part of the undead wave that sweeps through the hospital and eventually spills into the streets. The survivors retreat to the medical room, hoping to weather the storm, but the night turns even more brutal when the ranks of the undead swell and the living are forced to adapt quickly to a world gone feral.
In a harrowing finale, the living realize they are facing an endgame that overturns every assumption they held about safety and control. [Boris], [Jackie], and [Sam] confront the others in a bid to recruit them into a perverse, zombie-fueled “family.” The assault culminates in tragedy as [Boris] kills [Ava Flores], and [Isaac] makes a final, desperate decision, choosing suicide with the last pistol round rather than surrender to the infection. The film closes with the undead surge continuing to devour everything in their path, including a camera crew documenting the carnage, signaling that the nightmare has expanded beyond the hospital’s walls and into the world itself.
