Grace receives a letter from a solicitor informing her that former colleague Christina has died and left her a house in Ibiza.

Grace visits Karl and Daniel's graves before departing, telling Karl about her trip and apologizing to both of them.

Grace arrives at Christina's Ibiza house, finds a dusty interior, and discovers an olive jar filled with mysterious briny water.

Inside Christina's house, Grace finds a letter from Christina that implies Christina knew she was going to die.

Grace visits Atlantis Scuba and meets the eccentric, intimidating Alberto Ribas, who has a snake draped around his neck.

Grace and Alberto dive near Es Vedrà at midnight, where Grace encounters a glowing supernatural entity known as La Presencia.

Grace wakes up in a hospital bed after the diving incident, feeling unusually rested and better than she has in years.

Alberto explains that La Presencia has given Grace clairvoyant and telekinetic powers, and that Christina escaped to an underwater planet called Salacia.

Grace drives to the airport to flee Ibiza but reads a doctor's mind and discovers that Alberto is dying of cancer.

Alberto's daughter Marta tells Grace that developer Art Butler planned to kill Christina to stop her anti-development protest.

Grace, Alberto, and Marta confront politician Sofía Torres and strike a deal to withdraw her support from Art Butler's development company.

Grace, Alberto, and Marta attend Lieke's show at Amnesia, where Lieke rallies thousands of people to join the protest.

Grace visits Salacia in a dream and reunites with Daniel, who tells her his death was not her fault.

At the public press conference, Grace summons Ibiza's wildlife and a snake bites and kills Art Butler.

Alberto dies of cancer, and Grace and Marta scatter his ashes near Es Vedrà before Grace decides to stay in Ibiza permanently.

Grace, a grieving 72-year-old widow, inherits a house in Ibiza from a former colleague and travels there to uncover the mystery of her death. After meeting the eccentric Alberto Ribas and diving with him at midnight, Grace encounters La Presencia and gains supernatural powers. She discovers that developer Art Butler plans to destroy Ibiza's fragile ecosystems and that he may have killed to protect his ambitions. Working with Alberto and his daughter Marta, Grace rallies thousands of protesters and confronts Art at a climactic press conference. After Art is killed by a snake and Es Vedrà is saved, Grace loses her close friend Alberto to cancer but chooses to remain in Ibiza, having found a new home and purpose.

Grace's transformative journey from grief to purpose in Ibiza.

Former student Maurice Augustine emails Grace to share his grief over his mother's death and to seek her advice.

Grace lives alone in her Lincolnshire bungalow since Karl's death, spending her days watching television and playing word puzzles.

Grace undergoes surgery on her varicose veins and makes the impulsive decision to travel to Ibiza despite thinking herself too old.

Taxi driver Pau drives Grace to Christina's house, telling her along the way that Ibiza is a strange and mysterious island.

Grace discovers an extinct yellow flower blooming outside Christina's front door that was not there when she first arrived.

Grace meets Rosella at the Santa Gertrudis supermarket, who tells her Christina worked as a psychic and warns her about Alberto.

Grace researches Christina and Alberto online and discovers a photo showing her own St. Christopher pendant lying on the ocean floor.

Grace visits Las Dalias market and meets Sabine, who tells her Christina was organizing a protest against the Eighth Wonder development.

During the midnight dive, Grace retrieves her St. Christopher pendant from the underwater seagrass where it appeared in the photograph.

After the dive, Grace discovers she can suddenly read Spanish fluently and sense the stories behind every photograph on Christina's walls.

Grace encounters Lieke van der Berg on the roadside, and Lieke warns her that Christina had deliberately recruited Grace as her replacement.

Alberto tells Grace about his wife Julia's death, his subsequent struggle with alcohol, and how La Presencia helped him recover.

Grace and Alberto visit a church where Grace touches Francisco Paulau's 1855 manuscript and inhabits his mind and his encounter with La Presencia.

Grace and her friends win money at the casino roulette table and Grace then challenges Art Butler directly at the poker table.

Sofía Torres publicly voids her agreement with Eighth Wonder, and Grace later gets a bluebird tattoo on her wrist to honor Daniel.

After former student Maurice Augustine reaches out to Grace in his grief, readers learn that Grace has been living a withdrawn, joyless life in England since her husband Karl's death. A mysterious trip to Ibiza begins with small but significant revelations — cryptic neighbors, a pendant photographed on the ocean floor, and whispered warnings about Alberto Ribas. Through conversations at a supermarket, a market stall, and a scuba shack, Grace steadily pieces together Christina's life, her protest, and her disappearance. The supernatural dive transforms Grace, granting her new perceptual abilities and a renewed hunger for life, while new friendships with Alberto, Marta, and Lieke deepen her investment in Ibiza's fate. By the novel's end, the island's fragile ecosystem is preserved and Grace marks her healing by tattooing a bluebird on her wrist in honor of Daniel.

The hidden discoveries and relationships behind Grace's island adventure.

Grace recalls the Christmas evening when she noticed lonely colleague Christina and invited her over, giving her a St. Christopher pendant.

Grace recalls refusing to drive Daniel to the shops and how Daniel took his bike alone into the rain and was killed.

Grace discovers that the olive jar she emptied has mysteriously refilled itself with seawater, suggesting something supernatural is at work.

Grace visits the local authorities to show them Christina's letter, and an officer warns her to stay far away from Alberto.

Grace confesses to Maurice that she feels undeserving of happiness in part because she once had an affair with a colleague.

Alberto tells Grace that if she meets him at midnight for a dive, she will find all her answers about Christina's fate.

The olive jar glows with eerie light in the night, cementing Grace's decision to go through with the midnight dive.

Grace drinks orange juice after returning from the hospital and is overwhelmed by a profound pleasure she has never experienced before.

Grace accidentally injures a rude restaurant customer and shatters a lobster tank, revealing the uncontrolled and dangerous side of her new powers.

Alberto shows Grace a video recorded by Christina, in which Christina explains she fled to Salacia to escape being murdered.

Grace reads Sofía Torres's mind at a restaurant and learns that Art Butler admitted to murdering a political rival who opposed him.

After agreeing to help Marta's protest, Grace returns to Christina's house and feels for the first time that she has a real purpose in Ibiza.

In a dream set in Salacia, Grace meets Karl, who admits his own affair and urges her to release her guilt.

Art Butler attacks Marta's mind at the casino, and Grace pours Alberto's healing seawater over Marta to revive her.

Maurice writes back to Grace, thanking her for the bungalow and her story and promising to visit her in Ibiza soon.

Pool 3 traces the pivotal revelations, admissions, and supernatural visions that drive Grace's internal transformation from guilt-ridden isolation to hard-won healing. Beginning with the cherished Christmas memory that first linked her to Christina and the long-buried guilt over Daniel's death, these events expose the shame that has paralyzed Grace for decades. The glowing olive jar and the midnight dive mark the start of her supernatural awakening, while the orange juice scene and the lobster tank incident reveal both the wonder and the danger of her new powers. Christina's video and Grace's reading of Sofía Torres's mind clarify the true threat that Art Butler poses before Grace's dreams in Salacia bring healing encounters with both Karl and Daniel. Maurice's grateful final email closes the loop, confirming that Grace's decision to share her story has changed not only her own life but the life of someone she loves.