The Running Grave

The investigation into the Universal Humanitarian Church comes to a head once Flora Brewster, a former member, reveals the church's darkest secrets in a supervised session with Will Edensor: Jonathan Wace's corrective rapes of women deemed mentally ill or lesbian, unreported deaths and burials on the farm, and a large-scale trafficking operation built on unregistered births within the cult. Armed with this and Robin's earlier evidence (including the disturbing Polaroids and the cover-up of a dying child, Jacob), Strike and Robin push their police contacts into acting, and a raid is finally launched on Chapman Farm. The raid dismantles the church's operations, and Jonathan Wace is arrested.

The mystery of Daiyu Wace's death, mythologized within the church as the drowning of the "Drowned Prophet," is solved in the same climax. Strike confronts Abigail Wace and lays out the truth: years earlier, Abigail murdered her young sister Daiyu out of jealousy, disposed of her body using the farm's pigs, and staged a fake drowning with the coerced help of Cherie Gittins and other teenage cult members. Robin, meanwhile, chases Becca Pirbright to the UHC's London temple, where she finds Mazu Wace hiding with a kidnapped baby. Robin overpowers Mazu and forces the truth into the open: Becca had long manipulated the narrative around Daiyu's death, having seen her leave the dormitory alive well before the supposed drowning. In the aftermath, Becca remains devoted to the now-discredited church even as it collapses around her.

Will Edensor, who fled the farm earlier with his daughter, is reunited with his family after Strike and Robin help extract Will's partner Lin from the cult as well. In tribute to Will's late mother, the couple rename their daughter Sally. Robin, who endured drowning as punishment, solitary confinement in a box, and forced caretaking of a dying child during her time undercover, recovers physically and emotionally from the ordeal, and is cleared of the false molestation accusations the church leveled against her.

On a personal note, Strike is forced to reckon with the suicide of his ex-girlfriend Charlotte, who died after he repeatedly refused her attempts at contact; he later finds some peace discussing her final note and last words with her sister Amelia. The book closes as Robin prepares to leave for a trip with her boyfriend, policeman Ryan Murphy. Just before she goes, Strike makes an indirect but unmistakable confession of his love for her, leaving their relationship poised on the edge of change as the book ends.

Cormoran Strike and Robin Ellacott's agency was hired by Sir Colin Edensor to extract his son Will from the Universal Humanitarian Church (UHC), a cult based at Chapman Farm in Norfolk — a location with personal history for Strike, who lived there briefly as a child, and where his sister Lucy was molested. Robin went undercover at the farm, enduring the cult's starvation tactics, forced labor, sexual coercion from church leaders Taio and Jonathan Wace, and brutal punishments including forced drowning and solitary confinement in a box. She found Will living there with a daughter, Qing (later renamed Sally), fathered with a young cult member named Lin.

While Robin worked undercover, Strike investigated the cult from outside, uncovering a pattern of suspicious deaths, including the 1995 drowning of the Waces' seven-year-old daughter Daiyu, mythologized within the church as the "Drowned Prophet." During this period, Strike's ex-girlfriend Charlotte repeatedly tried to contact him, claiming she had cancer; he refused, and she later died by suicide, leaving him with guilt he only partly resolved by talking with her sister Amelia.

Robin eventually escaped the farm with Strike's help after narrowly avoiding further sexual coercion, and after witnessing the church's cover-up of a dying child, Jacob. Will also fled the farm with his daughter, initially resistant to leaving the church's influence but gradually opening up. A former member, Flora Brewster, revealed the church's core secrets — corrective rape, unreported deaths, and a trafficking operation involving unregistered births — which, combined with Strike and Robin's evidence, triggered a police raid that brought down the UHC. Jonathan Wace was arrested. The mystery of Daiyu's death was solved: her sister Abigail had murdered her out of jealousy, disposed of the body, and staged a fake drowning with help from coerced teenage members, including Cherie Gittins (who later died by suicide once confronted) and Becca Pirbright, who remained loyal to the collapsed church even after the truth came out.

By the book's end, Will was reunited with his family and partner Lin, and the couple renamed their daughter Sally in honor of Will's late mother. Robin recovered from her physical and psychological ordeal and was cleared of false accusations leveled by the church. As book #7 closes, Robin is in a relationship with policeman Ryan Murphy and is about to leave with him on a trip, while Strike — still processing Charlotte's death — makes an indirect confession of love for Robin just before she departs. Their romantic tension remains unresolved going into the next book, as does the aftermath of the UHC's collapse and its exposed crimes.