Set in a small coastal town in East Africa at the turn of the 20th century and spanning decades into the post-independence era, the novel weaves together two love affairs separated by generations, both shaped by colonialism, family obligation, and the costs of obedience. The story unfolds across three parts, with a first-person narrator eventually revealed as Rashid, the younger brother of one of the central characters.
In 1899, Hassanali, a timid shopkeeper who serves as the dawn prayer caller at his local mosque, discovers an exhausted stranger at the edge of town. Anxious by nature and fearful of the dark, Hassanali mistakes the approaching figure for a ghoul and collapses in terror. When daylight reveals a man covered in cuts, Hassanali calls for help. Neighbors carry the stranger into Hassanali's yard, where his elder sister Rehana reacts with suspicion while his young wife Malika responds with concern. A local healer named Mamake Zaituni examines the man and discovers he is a European. She finds no disease, only exhaustion and a badly bruised shoulder. Hassanali decides the stranger is a burden God has chosen for him and resolves to keep him.
Frederick Turner, the British District Officer posted to the town, soon hears the news. He follows an Indian legal agent named Siddiq through the town's narrow lanes to Hassanali's shop, where he finds the wounded man on a mat. He orders the man carried to his own residence and suspects Hassanali of stealing the stranger's belongings. The stranger's first coherent words are an unexpected question: "Have you ever been to the Seychelles?" His accent confirms he is English.
Over the following days, the stranger convalesces and tells his story. He is Martin Pearce, a historian and amateur linguist who had been working in Egypt's education service. After traveling in Abyssinia (present-day Ethiopia), he met a wealthy gentleman named Weatherill in Aden and joined his hunting expedition across southern Somalia. Unable to bear the slaughter of wildlife, Martin demanded to leave. Three Somali guides assigned to escort him to the coast robbed him and abandoned him. Martin walked south alone for four days before reaching the town. Burton, a fellow Englishman who manages an outlying estate, visits and argues that the African population will decline and be replaced by European settlers. Martin quietly suggests that in time the British will come to be ashamed of their colonial actions. During a walk to the ruins of a tomb belonging to a sharif, a descendant of the Prophet Muhammad, Martin is bitten by an insect. Frederick's servant Hamis warns that local belief holds anyone bitten on the sharif's tomb will be unable to leave.
Frederick sends Martin to thank Hassanali's family. Staying for lunch in the whitewashed yard, Martin meets Rehana properly for the first time and finds himself transfixed by her dark eyes, feeling a charge between them he cannot suppress. The narrative shifts to Rehana's perspective. Her father Zakariya was an Indian Muslim who came to Mombasa on the monsoon trade winds and married their mother Zubeyda, a local Swahili woman. After Zakariya died suddenly, teenage Hassanali opened the shop and never stopped working. Rehana declined several marriage proposals, then fell in love with an Indian merchant named Azad who claimed a connection to their father's family. They married, but after seven months Azad left to settle business affairs and never returned. Five years of silence confirmed his abandonment, and Rehana sank into bitterness. When Hassanali first brought the wounded stranger home, Rehana's immediate thought was that Azad had returned, a flash of terror and elation that dissipated when she saw it was not him. In secret, she kept a leather-bound notebook she found in the stranger's rags, filled with his handwriting and drawings.
The narrative is interrupted by a first-person voice. Rashid, the narrator, confesses he cannot fully imagine how Martin and Rehana became lovers, yet he knows it happened because it had consequences for his brother Amin. He states the essential facts: Martin and Rehana lived openly together in Mombasa until Martin returned to England. Rashid explains that Amin mentioned Jamila, the woman he once loved, for the first time in decades when Rashid wrote about his own wife Grace leaving him, and this prompted Rashid to write their story, which required imagining how Rehana and Martin first came together.
Part II opens in 1950s Zanzibar with the childhood of three siblings: Farida, Amin, and Rashid. Their father Feisal, a respected teacher known as Maalim Feisal, and their mother Nuru, called Mwana, both defied their families to study and marry. Amin is cast from childhood as reliable and obedient; Rashid, two years younger, is impulsive and dreamy. Farida, the eldest, fails the entrance exam for secondary school and eventually becomes a dressmaker. Mwana is diagnosed with glaucoma and retires, terrified of going blind.
Amin enrolls at the local teachers' college and one afternoon comes home to find Jamila, a beautiful divorced woman in her mid-twenties, visiting Farida for a dress fitting. He is immediately transfixed. Farida reveals the family scandal trailing Jamila: Her grandmother was the mistress of an Englishman in Mombasa, and her mother Asmah is the child of that union. Through Farida's mediation, Amin and Jamila begin a secret affair, meeting at her flat after dark. Discovery, however, is inevitable. Amin's Aunt Halima learns of the relationship and tells Mwana. Their father Feisal stands rigid with fury; Mwana delivers a devastating speech about Jamila's lineage: "They are not our kind of people." Amin offers only three words: "I love her." His parents keep him up until he promises to end the affair. Amin, whose identity rests on obedience, cannot bring himself to defy them.
In August 1963, Rashid departs for England on a scholarship. He endures loneliness and casual racism, and his correspondence with Amin becomes their primary bond. News of the Zanzibar Revolution reaches Rashid through a BBC broadcast; weeks of silence follow before a cautious letter from Amin confirms the family is safe. Their father instructs Rashid never to return.
Years pass. Rashid completes his Ph.D. and settles in a small English town. He marries an Englishwoman named Grace, who eventually leaves him. In his grief he writes to Amin, who replies by mentioning Jamila for the first time in over 20 years. Their mother dies. Amin reveals he is going blind from the same condition that took their mother's sight.
Farida sends Rashid a packet containing Amin's notebooks, written over many years. In them, Amin reveals the full depth of his anguish. He imagines himself with Jamila every day. He records what Jamila told him of her family history: Her grandmother Rehana's lover was named Pearce; after Pearce left, Rehana moved to Mombasa and lived for 14 years with a Scottish water engineer named Andrew Mills, who helped her establish a cloth business. Rehana named her daughter Asmah, meaning "the one without sin," but Asmah was raised by Hassanali and Malika rather than by Rehana. After the revolution, Amin learned Jamila was attacked on the night of the uprising by men looking for a government minister she was rumored to be seeing. He chronicles their father's dismissal from teaching, their mother's blindness, and the pervasive fear of life under the new regime. He becomes an unofficial officiant at neighborhood funerals, finding meaning in the communion of prayer. He writes that the dark and the silence have become a kind of bliss.
In a final section, Rashid attends a conference where he meets Barbara Turner, Frederick Turner's granddaughter. Barbara reveals that her mother, Elizabeth, is Martin Pearce's daughter and married Frederick's eldest son, John. Elizabeth, now in her late seventies, is stunned to learn Martin had a daughter named Asmah with Rehana, meaning she has a half-sister she never knew about. Rashid, having read Amin's notebooks, decides it is time to go home and beg pardon for his neglect. Barbara, with whom he has begun a relationship, asks to accompany him; she wants to help find Jamila, who is her cousin. Rashid agrees and writes to his father to explain, noting with gentle comedy that they will have to sleep in separate rooms.