The story is set in the city ofCorrientes, part of the Argentine Littoral, on the shore of the Paraná River. Eduardo Plarr is an unmarried medical doctor of English descent who when a boy left Paraguay with his mother to escape the political turmoil for Buenos Aires. His English father remained in Paraguay as a political rebel and, aside from a single hand-delivered letter, they never hear from him again. When Plarr moves to Corrientes, a quiet, subtropical backwater, he strikes up an acquaintance with the two other English inhabitants: a bitter elderly English teacher, Humphries, and the British Honorary Consul, Charles Fortnum. Fortnum is a divorced, self-pitying alcoholic who abuses his position for gain. Plarr's other acquaintance is Julio Saavedra, a forgotten but self-important Argentine writer of novels full of silent machismo. Visiting the town brothel with Saavedra, Plarr is attracted to a girl, Clara, but she is taken by another man. Later, when he is called to treat Fortnum's new wife, Plarr recognizes Clara. Although he has never been to England, Plarr regards himself as a cool, self-controlled Englishman. Nonetheless he finds himself obsessed by Clara and seduces her with a pair of highly decorative sunglasses. They then begin an affair in which he remains emotionally distant from her. "Caring is the only dangerous thing," Plarr says in the novel. "Love was a claim which he wouldn't meet, a responsibility he would refuse to accept, a demand. So many times his mother had used the word when he was a child; it was like the threat of an armed robber. 'Put up your hands or else...' Something was always asked in return: obedience, an apology, a kiss which one had no desire to give." When Clara becomes pregnant Fortnum, believing the child is his, drinks less. Two of Plarr's friends from his Paraguayan Jesuit schooldays turn up at his surgery. One is Rivas, a married priest, now defrocked. They tell Plarr his father is alive and in a jail in Paraguay, and that they have a plot for which a doctor's assistance is needed to kidnap the US Ambassador on his trip to Corrientes to see ruins. They intend to ransom the ambassador for the release of political prisoners in Paraguay, including Plarr's father. However, they are incompetent and mistakenly kidnap Fortnum instead. They take him to a squalid hut in a shanty town while bargaining with the authorities. Plarr goes to the hut, where Fortnum, who has been shot in the leg while attempting to escape, lies drinking whisky. Fortnum spends much of his time, as he faces up to his impending death, sentimentalizing about Clara and remembering the fearsome figure of his father. He overhears Plarr confessing his adultery with Clara and that the child is Plarr's. The police surround the hut while the failed priest, Rivas, conducts a makeshift mass inside with the rain coming down. When the police deadline is about to expire, Plarr goes out to talk with them. The police shoot him dead, and his death is blamed on the kidnappers. The kidnappers are captured, and Fortnum restored to Clara. Plarr's mother, once a beauty and now bloated, along with some of his previous mistresses attend his funeral. Saavedra reads a homily. The UK embassy then relieves Fortnum of his consulship and tell him he will be awarded an OBE in the next UK honours. In the last scene, Fortnum and Clara reconcile and name the child Eduardo, after Plarr.
