Amelia and Adam drive through a winter snowstorm to Blackwater Chapel, arriving to find the remote building locked and dark.

Amelia sees a face peering through the kitchen window and screams, shattering a wine bottle on the floor.

Amelia descends into the wine crypt alone and the trap door slams shut, leaving her in total darkness.

Adam rescues Amelia from the sealed wine crypt and brings her inhaler during a severe asthma attack.

Adam secretly opens the door marked DANGER and climbs to the crumbling belltower overlooking the snow-covered landscape.

Bats swarm out of the belltower as the retaining wall collapses and Adam nearly plunges to his death.

Adam wakes Amelia with a recurring nightmare about a woman in a red kimono being struck by a car.

Amelia and Adam discover their dog Bob has vanished from the supposedly locked chapel overnight.

Amelia and Adam walk to the nearby cottage and see a gray-haired woman inside who refuses to answer the door.

Adam and Amelia find a gravestone in the chapel graveyard bearing Henry Winter's name, with Bob's collar placed on top.

Amelia and Adam discover all four tires on their car have been deliberately slashed, stranding them at the chapel.

Adam and Amelia find themselves locked inside the chapel as an envelope bearing Adam's name slides under the front door.

Adam reads the letter inside the envelope, which reveals that Amelia was the teenager who stole the car that killed his mother.

Amelia grabs a kitchen knife and advances on Adam as a second figure appears silently behind her holding a pair of scissors.

Detective Sam finds Blackwater Chapel chained shut and stumbles over a fresh, unmarked grave in the chapel graveyard.

Amelia and Adam arrive at Blackwater Chapel hoping a remote Scottish getaway will save their failing marriage, but the isolated building quickly turns threatening. Strange faces at the window, a trap door slamming shut in the wine crypt, and a near-fatal collapse in the belltower signal that someone is actively tormenting them. After their dog vanishes and their tires are slashed, the couple realizes they cannot leave and are being hunted by an unseen hand. Hidden clues inside the chapel point toward the mysterious author Henry Winter, but the locked doors make escape impossible. A letter slipped under the front door exposes Amelia's darkest secret and forces an explosive confrontation between husband and wife. The weekend ends not with a rescued marriage but with violence, and a detective's grim discovery months later confirms that not everyone walked out of Blackwater Chapel alive.

The haunted weekend that unravels a deadly secret.

Adam proposes to Robin by having a rescue dog wear a collar engraved WILL YOU MARRY ME and they play Rock Paper Scissors to seal it.

Robin secretly contacts Henry Winter and persuades him to let Adam adapt one of his novels, launching Adam's career.

Adam's first screenplay adaptation sells at auction for more money than Robin could earn in ten years, bringing sudden wealth.

Adam and Robin attend a glamorous film industry party at Tower Bridge where Adam cannot recognize a single guest's face.

Robin suffers a miscarriage after months of failed IVF treatments and discards the anniversary cushion Adam gave her.

October O'Brien arrives at Adam and Robin's home on their anniversary, claiming she came to prepare a surprise celebration dinner.

Robin searches the couple's chapel bedroom and empties Amelia's asthma inhaler before placing it back exactly where she found it.

October O'Brien dies by suicide at thirty, ending all prospects of a Rock Paper Scissors film adaptation.

Henry Winter calls Robin from the hospital to say he is dying and asks her to come to Blackwater Chapel.

Adam invites Henry Winter to their home without asking Robin, prompting her to flee and stay with her colleague Amelia.

Amelia appears at Adam and Robin's front door on their anniversary, transformed with new blonde hair and a red dress.

Robin comes home early to find Adam in bed with Amelia and walks out of her marriage without looking back.

Robin assumes Henry's literary identity and submits a novel through his agent, which is hailed as his finest work.

After Adam sends his Rock Paper Scissors script to Henry asking him to novelize it, Robin devises her plan for revenge.

Robin writes a letter describing her contented life with Adam, Bob, and Oscar the rabbit back in London.

Told through Robin's secret annual letters and key backstory events, this pool traces the arc of two marriages to the same man. Robin's devoted relationship with Adam is slowly hollowed out by his emotional neglect, a devastating miscarriage, and his deepening obsession with his career and glamorous collaborators. The seemingly innocent arrival of Robin's best friend Amelia on a quiet anniversary evening is the beginning of the end, culminating in Robin walking away after the ultimate betrayal. With nowhere left to turn, Robin finds unexpected purpose when her estranged dying father calls her to Blackwater Chapel, and she quietly assumes his literary identity. Her revenge is years in the making, assembled patiently from the ruins of everything she lost, and it ends with her writing contentedly from a reclaimed life.

The marriage Robin built and the life Amelia stole.

Amelia hides Adam's cell phone before the trip to isolate him, and Adam secretly recovers it and brings it anyway.

Robin sneaks into the chapel at night, locking doors and placing hidden items for Amelia and Adam to discover.

Adam admits in his narration that he deliberately cut the chapel's power twice while carrying out his own secret plan.

Adam and Amelia read a chapel history brochure revealing the building once served as a prison and execution site for accused witches.

From the snow-covered hilltop, Adam spots a woman in a red kimono entering the distant chapel below.

Adam and Amelia find Henry Winter's private writing study concealed behind the chapel library, filled with his personal possessions.

The missing staircase photos reappear in full, forming a family portrait sequence that places Robin alongside Henry Winter.

Adam and Amelia find a child's bedroom packed with carved robin imagery and an eyeless jack-in-the-box bearing Adam's name.

Amelia shows Adam the staircase wedding photo in which Robin, not Amelia, is the bride standing beside him.

Adam realizes that the date Robin chose for this confrontation marks the twelfth anniversary of his first marriage to her.

Robin discovers that Henry hired a private detective who had compiled detailed files on her, Adam, and Amelia.

Robin's anniversary letter offers Adam three choices named rock, paper, and scissors and a new life if he returns to her.

Amelia reveals she had already consulted a lawyer and banker before the trip, intending to leave Adam the moment they returned home.

Robin's letter reveals that Henry Winter was her estranged father and that he signed Blackwater Chapel over to her before dying.

Adam confesses privately that he, not Amelia, was actually behind the wheel of the stolen car that struck and killed his mother.

This pool follows the chain of deceptions and revelations that give the novel its labyrinthine structure, beginning with the small mutual betrayals Amelia and Adam bring to the chapel before anything supernatural happens. Covert acts accumulate — hidden phones, cut power lines, a midnight intruder planting evidence — into a picture of conspiracy far larger than a troubled marriage. Each discovery inside the chapel reframes what the reader thought they understood, from the reappearing photographs to the wedding portrait that exposes which woman was truly Adam's first wife. Robin's final letter detonates a bombshell about the hit-and-run that defined Adam's childhood, forcing a violent reckoning. Yet the pool closes with the most devastating twist of all: Adam's private admission that the truth Robin exposed is only half the story, and the half that remains belongs to him.