The film begins in a desolate rural setting where chaos ensues as two individuals desperately flee from two armed men. One of them is shot and left wounded, while the other narrowly escapes into the night. The attackers, one older and one younger, approach the incapacitated woman. In a chilling act of cruelty, they cover her in gasoline before igniting her, leaving her to burn to death. Meanwhile, an enigmatic figure cloaked in a white robe, marked by a sinister black triangle on their face, watches the horrifying scene unfold from a distance.
In a different location, Officer Daniel Carter finds himself patrolling a lonely country road when he receives a dispatch call. His night takes a turn when he spots a bloodied man crawling out of the woods. Initially mistaking him for a drunken teenager, Daniel soon realizes the gravity of the situation as he rushes the injured man into his squad car, blood staining his uniform. Despite the nearby hospital being in the process of closing due to a recent fire, he heads there, hoping for urgent medical assistance.
Upon arriving at the hospital, a frantic nurse named Allison, who is revealed to be Daniel's estranged wife, attends to the injured man. Daniel takes a moment to greet teenage Maggie and her grandfather Ben, who are there for Maggie's pregnancy check-up. As the doctor examines the bloodied man, Daniel discovers heroin marks on him, prompting him to wash off the blood. He converses with Dr. Richard Powell, who subtly warns Daniel about going easy on Allison, hinting at the shared trauma of losing a child.
At the same time, nursing intern Kim interacts with patient Cliff, expressing her frustrations with the hospital's dire staffing situation. However, tension escalates when Daniel witnesses a horrific act: Beverly, a nurse, plunges a pair of scissors into Cliff's eye. As panic ensues, Daniel shoots Beverly, who reveals that she has grotesquely mutilated her own face. In shock, he stumbles into a bathroom, overwhelmed by the events occurring around him.
Unconscious, Daniel experiences haunting visions of a dark landscape, and upon waking, he insists on reporting the violent incident. His determination clashes with the concern from both Allison and Dr. Powell. Meanwhile, state trooper Mitchell arrives to investigate a nearby mass murder, raising questions about the events transpiring at the hospital.
As Daniel exits to find his car, he's confronted by the mysterious figure clad in white. A confrontation ensues, leaving Daniel stabbed and once again unconscious. As he teeters on the brink of consciousness, another scream reaches him from the junkie’s room—a grotesque, tentacled version of Beverly attempts to attack the junkie. Daniel and Mitchell manage to contain her, but the situation spirals out of control when the original attackers burst into the hospital demanding the junkie.
In a moment of chaos, the junkie takes Maggie hostage, leading to a standoff that results in Dr. Powell being mortally wounded in the midst of conflict. As things spiral wildly, Daniel witnesses her grotesque transformation, with tentacles emerging from someone he loves. Just when fears escalate, he makes a desperate plan to retrieve weapons from his car, accompanied by the reluctant duo—Vincent and Simon, who harbor their dark desires for revenge.
They rush to find that their path is riddled with juxtaposed dangers as they gather supplies and attempt to make sense of the madness unfolding around them. Amidst the hospital's impending collapse and a cult revealing their sinister deeds, Daniel's pursuit leads him into a chilling maze filled with revelations regarding Dr. Powell's heinous experiments and the devastating loss that led him down this dark path.
Allison's circumstances overlap with the chaos as she faces a gruesome fate on the operating table, manipulated by Powell who has sinister plans for her and her unborn child. As the horrifying reality unfolds, Daniel battles against the manifestations of nightmares and the very real threats surrounding them.
In the end, the struggle culminates in an epic confrontation with twisted horrors, including the transformation of familiar faces into monstrous beings. Vincent and Simon's alliance becomes a lifeline as the group faces their darkest fears, culminating in a visual battleground filled with wrenching sacrifices, transformative horrors, and a desperate search for salvation.
As dawn breaks over the chaotic night, Daniel emerges into a stark, otherworldly landscape with an unshakeable bond to Allison, standing before a giant black pyramid, a stark reminder of the night's unfathomable horrors and the dark paths chosen in pursuit of answers.
