Plot
On May 14, 1989, six-year-old abductee Martin Bristol, whose face has been disfigured by his captor, watches as he butchers a young woman in the basement of a farmhouse.
Ten years later, on September 20, 1999, Julian and his girlfriend Marylin enact a bank heist with Marylin's ex-convict brother, Max, and accomplice Kurt, taking around $500,000. Max, who was shot by a security guard in the melee, dies in the car with Julian and Marylin; Kurt leaves in a separate car with the money, but breaks down en route to their meeting place: an abandoned house in the woods. Kurt takes Samantha Harrison and her adolescent daughter, Courtney, hostage from a gas station, forcing them to drive him to the house.
When they arrive, he binds and gags them, and leaves a large portion of the money stowed in the van. Courtney manages to free herself and flees, stumbling upon a large abandoned farm nearby. In pursuit, Kurt searches a vacant garage on the property before entering a house, which is dilapidated and filled with degraded furnishings. Inside, he is clobbered with a metal pulley and stabbed to death by an unseen assailant.
After burying Max's body in a field, Julian and Marylin drive to the abandoned house to meet with Kurt and divide the money. Arriving at nightfall, they find Samantha tied up and sleeping on the floor, and Kurt nowhere in sight. Julian takes his car to search for Kurt, leaving Marylin alone at the house with Samantha. From the foyer, Samantha watches as a man wearing Kurt's sack mask descends the stairs, but is unable to warn Marylin as her mouth is taped shut. The man drags Marylin into the dining room and stabs her to death. Meanwhile, while driving on backroads, Julian catches the attention of a parked police officer, and quickly retreats to the house, where he finds the entryway floor soaked in blood, and Samantha hiding in a closet. Samantha tells him that Kurt returned to the house and killed Marylin.
Julian and Samantha leave on foot to search for Courtney, and also stumble upon the adjacent farm property. While investigating the house there, they find Courtney locked in an upstairs closet with Kurt's corpse. As Samantha unties Courtney's arms, the man in the sack mask attacks Julian and incapacitates Samantha and Courtney. Samantha awakens in the basement hanging from the ceiling. As the killer approaches her with a knife, she manages to pull down the metal piping from the ceiling, freeing herself, and flees with Courtney. The killer pursues them, and Julian is left alone in the farm, where he discovers numerous corpses in various states of decay, and finds Marylin's body posed against an arrangement of human and animal bones.
Samantha and Courtney return to the adjacent house to retrieve the van keys. As they are about to leave, Samantha sees the killer coming toward the house, and the two retreat to a bedroom upstairs to hide, but the killer finds and attacks them. Julian arrives and shoots him, but he does not die immediately. Samantha smashes a chair over the killer's head, knocking him unconscious. Julian removes his mask, revealing a young man with a scar across his face; the killer is Martin Bristol, now a teenager. The three flee, and the police officer arrives at the house just as Samantha and Courtney exit. Julian stumbles out after them holding a gun, and the officer shoots him to death. When the officer goes upstairs to locate Martin, he has vanished.
The following morning, forensic investigators remove numerous bodies from the farm property, and uncover journals from the serial killer who abducted Martin and groomed him to be a killer himself. The journals suggest that Martin, who gained strength as he grew into adulthood, killed his abductor in the manners in which he was taught. That evening, Samantha prepares to go to bed; on the floor is the duffel bag full of the money that Kurt left in her van. While she and Courtney lie down to sleep, the closet door behind them opens.
