From the opening pages, a tense heist threads together a dangerous web around Khan, a notorious French heroin dealer. Four men plan the theft: Ben Tuttle and Bobby sprint out first, Ben fires on Bobby, and disappears with the money and drugs. The other two, Jack Witkowski and Marshall, arrive soon after, only to find Bobby dead and vanish before the law closes in. The sequence sets two strands in motion: a brutal crime in a bustling city and a quiet, insistent struggle in a London couple’s life.
In London, Tom Wright and his wife Anna wrestle with mounting debt as they renovate their home and grapple with infertility. When their downstairs tenant Ben dies of a heroin overdose, they discover a hidden stash—£220,000 tucked behind a loose ceiling tile. The money becomes a temptation and a risk: Tom uses some to chip away at the mortgage, Anna spends on fertility treatment, and Detective Halden, a relentless investigator, begins to suspect the Wrights know more than they admit. The tension hardens into a reluctant conspiracy as Halden quietly tracks their movements, weaving the personal with the criminal until the two plots collide.
A dangerous thread pulls tighter as a man is forced to reveal Ben’s location to Jack Witkowski, and he pays with his life. Witkowski and Marshall break into Ben’s old apartment in search of the money but come up empty-handed. Khan re-enters the picture with a blunt demand: pick a side in the murky war between criminals and the police. Tom refuses to align with Witkowski's gang, and the tension explodes when Witkowski corners the Wrights and tortures Tom. Halden arrives, and the confrontation flickers between capture and escape as the plan to use the Wrights as off-the-books bait is hatched and then tested.
During a staged money drop, the fragile balance breaks. Witkowski realizes that Halden is a cop, and chaos erupts as Marshall shoots Halden. The Wrights seize the moment and run off with the money, while Khan’s mood hardens into a calculation of betrayal. Halden survives the flashpoint in hospital, wearing a bulletproof vest, a reminder that the night’s violence will have lingering consequences.
Back at the renovated house, Witkowski and his men seize Anna’s friend Sarah and her baby, Julian, turning the Wrights’ precarious plan into a perilous hostage scenario. The Wrights warn Halden and rig the house for a final confrontation. Witkowski falls through the floor, and Tom drives nails into Marshall’s feet in a brutal stand-off. Khan and his men arrive unexpectedly, heightening the danger. Halden arrives in time to shoot one of Khan’s men with his car, allowing Sarah and her baby to escape, but Halden is knocked unconscious in the melee. The house becomes a battlefield, with Khan’s forces, Witkowski’s crew, and the Wrights locked in a deadly game of cat and mouse.
Inside, Tom’s resolve meets Khan’s aggression: Tom kills Khan’s other man, a pivotal move in the skirmish. Khan retaliates by killing Witkowski, and the fight between Tom and Khan escalates. Just as Khan is about to deliver a fatal blow, a shot from Marshall kills Khan, shifting the balance yet again. Anna, nearly choked by Marshall, is spared only when Halden re-enters and shoots Marshall dead. The house goes up in flames, forcing the Wrights to flee their former sanctuary. In the aftermath, Anna tells Tom that she is pregnant, a bittersweet note that hints at hope beyond the night’s violence.
