Girl A

Lex (Alexandra Gracie) is a corporate lawyer in New York, known publicly as "Girl A," one of seven children imprisoned and starved by their parents, Charles and Deborah Gracie, at 11 Moor Woods Road in the small English town of Hollowfield. The novel alternates between Lex's present-day efforts to settle her mother's estate and layered flashbacks to her childhood, captivity, and escape.

When Deborah dies of cancer in HM Prison Northwood, Lex travels to England. A solicitor named Bill presents the will, which names Lex as executor and bequeaths three assets to the surviving children: personal possessions, roughly twenty thousand pounds, and the house at Moor Woods Road. Lex takes her mother's meager belongings but declines to claim the body. She calls her sister Evie, and the two agree the house should become a community center, "something happy" that would have infuriated their father.

In an extended flashback, Lex recounts the escape. She describes years of escalating captivity: the early "Binding Days," when the children were restrained at night with soft materials, and the later "Chaining," when Father used metal handcuffs. On the final morning, Lex tore the skin from her right hand to free herself, smashed the bedroom window with a wooden stake, and dropped to the frozen ground, shattering her leg. Mother appeared at the kitchen door but did not stop her. Lex ran into the path of a car whose driver called the police.

To convert the house, Lex must secure the agreement of each surviving sibling. She begins with Ethan (Boy A), her eldest brother, now a headmaster in Oxford. Ethan pushes to brand the center with the Gracie name, but Lex refuses. He eventually concedes, on the condition that she handle everything alone. During her visit, Ethan's fiancée Ana Islip confides that he sometimes becomes a frightening stranger. Late at night, drunk, Ethan grabs Lex by the throat and warns her not to share certain stories. Lex accuses him of being "Father's son." A flashback reveals that Dr. K, Lex's hospital psychologist, once asked whether Ethan had hurt Lex, noting he was unchained and had been seen outside the house. Lex denied it, protecting him.

Flashbacks reconstruct the family's descent. Deborah grew up in a village, failed her grammar school entrance exam, and became involved with the Countryside Christian Church, where she met Charles. He established a church called the Lifehouse in Hollowfield, which attracted almost no congregation. As his ambitions collapsed, Father withdrew the children from school, sealed the windows with cardboard, and intensified his control. He discovered a book of Greek myths hidden under Lex's mattress and beat her with a wooden stake from the Lifehouse cross, causing severe injuries; Evie tried to distract him to protect Lex. The narrative also traces the aftermath of the escape: Father killed himself by ingesting poison shortly after Lex fled, and Mother was found cradling his body. Dr. K (Dr. Kay), a psychologist assigned to Lex in the hospital, guided her recovery. The children were separated and adopted by different families. Detective Superintendent Greg Jameson and his wife Alice adopted Lex at Dr. K's suggestion.

Delilah (Girl B), now devoutly religious and married to a pizza chain heir, signs the consent form but reveals that her brother Gabriel (Boy B) is in a psychiatric hospital. Lex visits Gabriel and finds him frail, medicated, and nearly bald. Flashbacks recount his exploitation by his agent and lover Oliver Alvin, who introduced Gabriel to cocaine and alcohol, persuaded him to sell childhood belongings from Moor Woods Road on a memorabilia website, then vanished with the packaged artifacts. Gabriel destroyed his flat and harmed himself. Oliver has now returned, and Lex suspects he wants the inheritance. After confronting Oliver and threatening legal action, Lex returns the next day to promise Gabriel the center will include addiction support. Gabriel reveals he has already signed the documents.

Lex tracks down Noah (Boy D), the youngest surviving sibling, who was adopted by an anonymous family. Years earlier, her adoptive father let slip that Noah's family lived in a town called Cragforth, and Lex eventually found a junior cricket listing with a vice-captain named Noah Kirby. She drives to Cragforth, watches him play, and follows one of his mothers home. The woman signs the documents, and Lex promises never to return.

Woven through these chapters is Lex's relationship with JP (Jean Paul), the great love of her life. She told him about her adoption and escape but withheld the full truth. When JP wanted a family, Lex revealed she would not have children, and the relationship ended. In the present, JP tells Lex his new girlfriend is expecting a baby.

With all signatures collected, Evie flies to England to help present the proposal to the Hollowfield council. When Evie falls ill, Lex attends the meeting alone, walking councilors through plans for a library, a hall, coding classes, and a garden. Asked for a name, she decides on the spot: "The Lifehouse." Bill drives her to the house, now a ruin of shattered windows and graffiti. She feels nothing.

That night, Lex wakes to find Evie gone. She walks to Moor Woods Road in the dark, enters the decaying house, and climbs the rotting staircase to their old bedroom. A small, huddled figure waits in the corner where Evie's bed once stood. "Do you really think I ever left this room?" the figure says.

Lex is found disoriented near the house and hospitalized. Dr. K arrives and presses Lex to say what happened to Evie. The truth the novel has built toward is confirmed: Evie was ten years old and still chained in the bedroom when police entered after Lex's escape. She never regained consciousness and died a day later. Daniel, a baby born premature and sickly during the captivity, was also found dead, his body concealed in a kitchen cupboard for months. Earlier flashbacks hinted at the truth: Evie whispered that Daniel had not cried for three days, and during a ceremony in which Father renewed his wedding vows, Evie asked, "Where's Daniel?" Dr. K explains that she told Lex early in her recovery that Evie had been placed with a new family, believing Lex would eventually accept the truth. Each time Dr. K tried to correct the lie, Lex's mind refused to process it. Every phone call with Evie, every plan they made, was a fiction Lex constructed to survive.

Lex recovers at her parents' cottage in Sussex and resumes sessions with Dr. K. An email from Bill confirms the council will fund the community center. Lex flies to Greece with her best friend Olivia for Ethan's wedding. At the reception, Delilah reveals what really happened on a night Lex long believed she heard a failed escape attempt from Gabriel and Delilah's room: Delilah had declared it her birthday, and Gabriel crept downstairs unchained to steal lemon cake. He tripped on the stairs, and Ethan held Gabriel down while Father beat him. The chains were introduced the next day.

Lex says goodbye to Ethan at the church doors and tells him not to ruin things. Alone in the villa on her final afternoon, she walks to the cove and sees a figure at the water's edge, a woman who looks as she always imagined Evie would. She calls her sister's name. The figure turns and raises an arm, beckoning or waving.