A man and woman posing as paramedics help a man in an overturned car on a busy freeway. As an ambulance draws near, the woman panics, tapes the man's mouth shut, and pulls him from the wreck before they speed away, leaving the rest of the scene to its confused squeal of sirens and traffic.
Meanwhile, Senga Wilson, a single mother, and her 15-year-old daughter Nat Wilson, Nat Mischa Barton in the role, are on a six-hour overnight drive home after visiting Nat's father Marek Wilson, Samuel Fröler for her birthday. En route, they pass the crash and notice a pair of strangers photographing the scene; as Senga watches, the man pivots his camera and directs it at her, an unnerving moment that sets a uneasy tone for what follows.
The strain of travel grows palpable as Senga fights fatigue and begins to drift toward sleep behind the wheel. She chooses to stop at a truck-stop diner to catch her breath. Outside, Nat encounters a young female backpacker, a stranger who seems open to a ride. Senga is visibly unsettled by the backpacker and by the odd ambient CD she leaves playing in the car, a detail that will echo later in the story. They drop the backpacker at a picnic area and, when they return to retrieve the CD, she has vanished. In the car again, Nat pushes to return to Marek's gift—Nat’s birthday present from her father—further straining the already taut mother-daughter dynamic.
A heated argument erupts when Marek has bought Nat tickets to a concert she refuses to attend. Frustration spills over, and Nat hops into an RV with the backpacker and a strange couple, vanishing from the vehicle she once shared with her mother. Senga, desperate for any help, seeks assistance from a police officer, but the response is slow and unhelpful. She follows the RV herself, trailing the officer who had just left the diner. The officer eventually meets up with the RV’s inhabitants, and Senga breaks into their vehicle, discovering a disturbing stash: thermoses filled with blood and videos of young girls discussing their past lives. She escapes before anyone returns, but the backpacker turns out to be hiding in the backseat and strangles Senga, plunging her into a brutal crash.
In a different, shadowy setting, Nat finds herself in the back of an oil tanker where she parties with the Backpacker and a young man involved in their group and its enigmatic leader. The atmosphere here hints at a larger conspiracy and a culture built around secrecy and control. Elsewhere, a Recovery Man—a disturbed drifter who hauls a tow truck—approaches Senga and insists that she accompany him. In his car, she discovers a picture of a girl she’d seen on a video inside the RV, and the man explains that the girl is Christine, his dead sister. This revelation deepens Senga’s sense of danger and loss, and soon she is brought to a police station to report Nat's disappearance. The police, however, prove unhelpful, and a call to Marek’s number yields a troubling line: Senga is said to be on medication and Nat has supposedly been with Marek all weekend.
Back at the truck stop, Senga spots the man and woman she had seen photographing the crash earlier and confronts the woman, forcing a confrontation that ends with the two separating. She flees into a hallway, where she encounters the same female and two male cult members, then escapes outside. The Recovery Man follows in pursuit with the rest of the group, and Senga trails them to an abandoned research facility, a place that looms large in the narrative’s ominous mood.
Meanwhile, Nat has a different encounter. She meets the Father, a controlling figure who speaks through loudspeakers to address Nat directly, and the Recovery Man detonates a bomb at that moment, killing several cult members. The Father tries to win Nat over, but Senga bursts in and interrupts the moment of manipulation, breaking the hold the Father has built over her daughter. The two flee in different directions: Nat is drawn toward the Father’s rhetoric and the promise of belonging, while Senga is driven by concern and the need to protect her child.
The Father’s shocking confession comes to light when he reveals the abortion Senga had contemplated, a detail that stuns her and threatens to hollow her resolve. The Recovery Man then pulls Senga into a brutal reality by showing Marek’s body, a stark reminder of the danger Nat now faces. With Marek’s corpse as proof of the threat, Senga intensifies her attempts to rescue Nat from “the group.” A violent struggle follows, in which the Recovery Man and the Father contend for control over Nat. In a brutal exchange, the Father bites the Recovery Man’s tongue and spits it out, a grisly moment that strains credulity even in a world of heightened suspense. Senga uses the distraction to trigger one final explosion, killing both the Recovery Man and the Father.
Mother and daughter escape together, continuing their daylight drive home. Their perseverance pays off in a final, quiet moment of relief, but their ordeal leaves a residual unease. At a gas station, they discover a razor blade attached to their rear-view mirror—the Father’s calling card—an ominous sign that the danger may still cling to them even as they move toward safety.
Notes on performances: Nat’s arc is anchored by Nat’s search for belonging and safety within a world that treats her as an object of power and manipulation. Senga’s journey evolves from exhausted, overwhelmed mother to a determined, protective figure who refuses to surrender her daughter to a cruel, hidden network. The film blends tension, suspicion, and a chilling sense of encroaching danger, using the stark contrast between the open highway and the claustrophobic spaces of RVs, oil tankers, and abandoned facilities to keep the sense of threat alive until the final, shattering moment.
