A prudish couple, Dudley and Lola, arrive in Blackpool by bus from Stoke-on-Trent and check into a seedy boarding house run by the sinister Leo Finch. On the same night, Carter Krantz rolls into town from London, dumped out of a car with nothing but a key and a scrap of paper bearing the name “Ambrose Chapel.” He believes a man connected to his mother’s murder is behind it all, and his chase leads him into a twisted web that begins at Finch’s boarding house and spirals through the town’s hidden underbelly. The key piece of the puzzle points toward a derelict church, once a sacred site, now repurposed as a nightclub called Sins, run by the scheming Shirley Woolf, a man’s man with a brutal streak and a wife who keeps watch over the family’s volatile fortunes.
As Dudley falls under Finch’s edge-of-criminal influence, he is drawn into a high-stakes poker game. When he discovers he has been robbed of £3,000, Finch menacingly implies that Lola will have to earn the money for him. Lola, initially terrified, discovers a surprising aptitude and even enjoyment in the work that befalls her—stripping at Mercy’s lap-dancing club, where Mercy is a power broker in her own right. The moral lines blur as Lola’s experiences widen, and the dynamic between Dudley and Lola shifts from bumbling friction to a complex, troubling dependency.
The plot thickens as Krantz connects with Ken Cryer’s information network, hoping to learn more about Ambrose Chapel. What begins as a simple lead quickly devolves into a string of grim discoveries: Cryer’s trail ends in tragedy, and the only stable clue remains the cryptic name “Malcolm Carpet.” Lola’s world intersects with Shirley and Connie, Shirley’s wife, who becomes entwined in Mercy’s broader schemes. Early on, Mercy, who runs a successful nightclub and has a history with the town, becomes the pivotal figure whose calculations drive much of the later drama. The tension between Shirley and his mother Mercy adds another layer of menace, while Connie’s pregnancy unsettles the already volatile household.
Mercy’s birthday party becomes a focal point for power plays. As the party unfolds, Mercy’s control over the town’s social machinery is laid bare: her influence reaches into Finch’s operation, and a ruthless tactic unfurls as she uses Krantz to pry into Shirley’s secrets. During this night, a brutal reminder of the town’s dark past surfaces: Mercy reveals that Krantz’s own mother’s life intersected with hers in Blackpool, and that his birth was entangled with a crime and a deception that stretch back to Ambrose Chapel. Finch claims the rape was committed by his brother Van Kneck, but Krantz learns that the past is far more tangled, and the truth is not readily revealed.
A dangerous alliance forms as Van Kneck, aided by two Finnish workers, attempts to manage threats to Mercy’s growing dominion. Lola becomes a target in a grotesque test of loyalty and fear: a Finnish brother attempts to prey on her, and Lola’s response is fierce and unyielding. She shoots the intruder in a brutal, almost clinical sequence that leaves her and Krantz scrambling to salvage the situation. To avoid exposure, Shirley and Krantz stage the attacker’s death as a drowning incident, aided by Ambrose Chapfel, the taxidermist, whose skills help mask the reality of the night’s violence.
As the town’s feud intensifies, Shirley contemplates the danger Lola poses if she reveals what she knows. Dudley, overwhelmed and overwhelmed again, wonders whether Lola will go to the police. The question lingers as Mercy intensifies her own plan, moving pieces into place with practiced precision. The tension erupts when an explosion rocks Shirley’s life at home, the blast blamed on Mercy’s machinations and confirmation that Liam, Shirley’s son, is entangled in the violence. Connie points to Mercy as the instigator of the calamity, and the revelation that Mercy’s hold over those around her extends to the younger generation becomes a driving force in the narrative.
In a pivotal confrontation, Krantz confronts Finch and asserts his true mother’s history, and Mercy’s long-standing claim to his allegiance. Mercy’s backstory is peeled back: Frannie Poole, Krantz’s mother, had lived with Mercy in Blackpool and was betrayed by the town’s dirty mechanisms. The confrontation lays bare Mercy’s role in the family’s legacy of crime, and Krantz learns that his father figure is Shirley, the man Mercy claimed to steer—an unsteady fatherhood marked by manipulation and fear. The truth reconfigures Krantz’s sense of belonging, and he must decide how to respond to Mercy’s revelation and the dangerous power she wields through Finch’s intermediaries.
The search for the crypt and its devastating contents leads Krantz and Lola to Bridewell Holdings, and Krantz receives a coded instruction to meet at a hotel suite at a precise hour. They are abducted, transported to a desolate beach, and faced with a grim interrogation about “the relic” and “the little fellow”—phrases that only gain meaning as the truth about Bridewell’s hidden past and the secret deeds tied to Blackpool’s fortune emerge. The killer’s confession confirms Mercy’s culpability in a wider conspiracy, and the stake in the crypt’s safe grows more urgent as the two gunmen fall into their own internal dispute, leaving Krantz in possession of the truth and at the mercy of Mercy’s next move.
When Krantz and Lola finally locate the safe, the lights go out just as the contents are about to be seized. They race toward Blackpool Tower, where a gala ball—hosted by Mercy—threatens to become a deadly staging ground. The tower’s top becomes the site of a tense standoff, where Gorillas in disguise must crowd-control the event so Mercy can claim her prize: the Bridewell deed, hidden in a humble teddy-bear hot water bottle that once belonged to Mercy’s father and to Frannie as a child. The deed to Blackpool Beach falls into Mercy’s hands, and her confidence swells with the prospect of untold wealth. Lola, quick and brave, seizes the document and sends it soaring into the tower’s framework on the breeze, while the two gorilla-clad men scale the structure in pursuit of the ring of power.
In the climactic clash, Mercy is cornered, Lola and Krantz escape with the critical object, and Shirley—the man Mercy believed to be loyal—falls to his death below as Mercy shoots him in a final, violent act. Krantz manages to restrain Mercy in Chapfel’s basement, a grim coda to a night of manipulation and revenge. The film closes with Krantz and Lola walking along the shoreline, the deed clutched between them but their future uncertain. As the waves roll in, Krantz’s last, unresolved question lingers in the air: what will he do now that the truth is out and the town’s old secrets have finally surfaced?
