Four young offenders – Tim, Sam, Dwight, and Zeb – and their caretakers – Kate and Jeff – travel to a Yorkshire village called Mortlake to perform community service, staying in a small cottage on the edge of town. On their first day they head to the local pub for a drink, where they meet Jim, the village bartender, and settle into the quiet rhythm of rural life that quickly grows tense.
The following day the group goes out to salvage abandoned trains, a grim assignment that soon turns dangerous. In a brutal ambush, [Tim] and [Sam] are attacked by three inbreds. [Jeff] makes a valiant, if desperate, attempt to intervene, but a metal shard strikes him and severs his femoral artery, setting off a chain of catastrophic events. They hurry back to the pub to seek help, but what unfolds there is shocking: Jim arrives, brutally decapitates [Jeff] with a cleaver, and traps the others in the cottage’s cellar, turning a moment of crisis into a massacre.
The village’s cruelty does not stop with the cellar. The inbreds take [Zeb] away, pinning him to the ground in a barn, and reveal that he is being used for a cruel show for the Mortlakers. Zeb is taunted and subjected to degrading torture, including invasive acts that heighten the sense of danger. In a shocking display, a horse is brought in to roam around him while the others work to pick the lock on the cellar door and escape. The horse is unleashed in a final, fatal act, crushing Zeb’s head and ending his ordeal.
Meanwhile, [Dwight] is captured again and forced into another grisly performance. He is restrained and subjected to a violent, dehumanizing procedure that inflicts severe injuries and agony. The survivors hurry back to the cottage in a frantic search for a map and any phones that were hidden away, hoping to contact help and perhaps escape this nightmare.
Back at the shed, [Kate] makes a desperate move to check for supplies, only to come face to face with Jim and a group of inbreds. She fights to protect herself, but Jim breaches the shed lock and injures her, severing her fingers. She staggers outside, trying to distract the attackers and buy time for the others, but a deadly misstep leaves her vulnerable: she steps onto a mantrap and is later killed when one of the inbreds severes her leg with a chainsaw. The violence is relentless, and her endurance is tested to the breaking point.
Inside the basement, [Tim] discovers a stash of alcohol and uses it to lure the pursuing inbreds downward with a Molotov plan in mind. Jim mocks the plan, stating the alcohol isn’t strong enough to burn, and the ambush turns deadly for him as the assailants close in. In the chaos, [Tim] is killed before he can light anything, a grim reminder of how quickly hope dissolves. Outside, [Sam] is pursued as she tries to escape, and a cruel bet among the attackers sets the stage for her fate. She steps onto a landmine, choosing to hold still in a moment of terrified suspense, but a ferret that crawls up her leg triggers the explosion that ends her life.
The film closes on a bleak, unflinching note as the inbreds finish their grim night and walk back toward Mortlake, heading to the pub for a pint, leaving the village and its victims behind in a stark portrait of violence and survival.
