Set in the Stoke Newington neighborhood of North London, the novel weaves together two timelines: a present-day story of feuding neighbors who transform a neglected shared garden, and a decades-spanning history of the two women who originally cultivated it as a community space. Framing both timelines are seasonal letters written by Maya, an elderly widow living across the road, addressed to her late best friend Alma.
In autumn 2018, Winston, a man in his early thirties who works at a local convenience shop, lives at Number 79 Eastbourne Road with his partner Lewis, a banker increasingly absent due to long hours. His new neighbor Bernice, a divorced architect at Number 77, has moved in with her young son Sebastian. They share the back garden due to an unusual clause in the deeds and clash constantly over noise, smoking, and competing claims to the space.
Winston is lonely. Lewis misses their five-year anniversary, sending gifts instead of coming home. Winston avoids calls from his sister Ruth in Canada, unable to face how unhappy he is, and has never told his family he quit the banking career his father planned for him. His mother's recent death weighs on him. When he buries a dead bird in the garden, the act overwhelms him with grief; Sebastian finds him crying and offers quiet comfort.
Mysterious envelopes begin arriving at Winston's door, addressed to "The Young Man at Number 79." Inside are photographs and clippings depicting the shared garden decades earlier: vibrant flower beds, community parties, and two women identified as Alma and Maya. The images inspire Winston to start gardening, partly to feel closer to his mother, who kept a garden in India, and partly to assert his right to the space. Sebastian helps him plant bulbs, confiding his worry that his mother gets lonely.
The parallel timeline begins in 1972, when Maya and her husband Prem arrive in London from Kenya, taking over the tenancy of Number 79 from Maya's elder sister Bina. Their neighbor Alma, a gruff, solitary woman at Number 77, is unwelcoming at first. Over months of cautious interaction, the two women build a friendship rooted in the shared garden. Alma introduces Maya to neighbors, including Erol, the local shopkeeper and father of the present-day Sal, and Jenny. The garden becomes a communal gathering place. In 1974, Maya tells Alma she is expecting a baby, and Alma reacts with rare joy.
Back in the present, Winston hosts a party for Diwali, the Hindu festival of lights, and Bonfire Night, a British November 5th tradition. Bernice reluctantly joins after burning her dinner, but the evening sours when her ex-husband Simon arrives uninvited and tramples Winston's freshly planted bulbs. The incident forces Bernice to recognize how closely her behavior mirrors Simon's. That evening, an envelope addressed to "The Lady at Number 77" arrives on Bernice's doormat, confirming she too is receiving the mystery correspondence.
In the historical timeline, the garden becomes a sanctuary beyond its horticultural purpose. After the first Bonfire Night party in 1975, Prem and Maya find two teenagers hiding in the garden after being chased by police who suspected them without cause. Prem tells them they can come whenever they need safety, and the garden becomes their regular refuge.
Winston and Lewis's relationship reaches a crisis when their landlord, Mr. James, reveals that Lewis has secretly purchased a house in Oxford without telling Winston. Bernice, who overhears the argument from the potting shed, brings Winston a margarita afterward, their first genuine connection. Lewis moves out in December. Bernice leaves a lasagne and a Christmas card on Winston's doorstep, urging him not to spend the holiday alone. Lewis returns on New Year's Eve, and they watch fireworks from the attic window, holding hands as the new year begins.
In December 1980, Alma confides to young Hiral, Maya and Prem's daughter, that she hates Christmas because her mother died on Christmas Day when Alma was a child, and that her mother's ashes nourished the eucalyptus tree in the garden. She joins Maya's family for the holiday meal, her first Christmas with others in decades. That night, Prem and Maya find her outside on the lawn, disoriented, calling for her dead father and failing to recognize them. It is the first unmistakable sign of cognitive decline.
In February 1988, Prem dies suddenly while sitting in his garden chair. Maya finds him with his cup of
chai on the armrest and knows immediately. Neighbors bring food daily during the 13-day mourning period. On the final day, Maya cups flower petals in her hands in the garden, releasing Prem's spirit. Alma places a tiny vase of snowdrops nearby, saying, "He liked them." When Mr. James later considers selling the property, Alma rallies the community to testify to the garden's importance, and he eventually registers it as an official community garden.
Through winter and spring 2019, Winston and Bernice's partnership deepens. They discover snowdrops blooming that neither planted, remnants of Prem's flowers. Bernice surprises Winston with a banana tree, honoring his wish to grow something recalling his mother's garden. A visit to the allotment of Sal, Winston's boss, reveals that Maya still lives at Number 68 across the road, increasingly reclusive. Winston and Bernice realize Maya is almost certainly behind the mystery envelopes but agree to wait until the garden is ready before approaching her.
Maya's summer 2019 letter to Alma reveals everything. She has lived at Number 68 for 27 years, watching the houses change hands. Jenny, her most enduring local friend, suggested she send the photographs to the new neighbors: "If you want to change it, you've got to make it seem like their idea." When Maya saw the tips of a banana tree peeking over the garden wall, she felt rescued herself.
The historical timeline's final arc traces Alma's worsening condition. She collapses in the garden and is hospitalized. Her niece Kate and Maya convince her to move to Kate's bungalow in the Peak District. At a final garden party in 1992, Alma toasts her friends as "the very best family I could have asked for." She dies in August 1995, and Maya begins writing her seasonal letters, fulfilling her promise to keep the garden's spirit alive.
The garden party takes place on 26 August 2019. Lewis arrives with sunflowers and asks Winston to start again, having turned down a promotion to rebalance his life. Ruth appears unexpectedly, secretly invited by Bernice, and ties a
rakhi, a protective thread symbolizing sibling devotion, on Winston's wrist for the first time in five years. Simon attends after Bernice confronts him about prioritizing time with Sebastian. At twilight, Sal guides Maya through the gate. She finds Prem's handmade chair still standing and is overcome. Bernice gives her a spare key, telling her she is welcome whenever she pleases.
In the days that follow, Winston and Maya build a photo album preserving the garden's history. Winston pastes in a photograph from the 2019 party and writes underneath: "The second first garden party, 2019," leaving pages blank for memories yet to come.
The epilogue returns to August 1992. Sitting together at twilight, Alma asks Maya to promise she will keep the garden going. Maya agrees without hesitation. Watching a fox cub settle among the ornamental grasses, Alma whispers, "You know, I've always loved those foxes," revealing the tenderness she spent a lifetime hiding.