George Smiley has become chief of the battered British Secret Service. The betrayals of a Soviet double agent have riddled the spy network, and Smiley wants revenge. He chooses his weapon: Jerry Westerby, "The Honourable Schoolboy", a passionate lover, and a seasoned, reckless secret agent. Westerby is pointed east, to Hong Kong. So begins the terrifying game.

Mr George Smiley is small, podgy, and at best, middle-aged. He is disillusioned, wrestles with idleness, and has been deserted by his beautiful wife. He is also compassionate, ruthless, and a senior British intelligence officer in short-lived retirement from the Circus, the British Secret Service organisation situated in London. But Moscow centre has infiltrated a mole into the Circus, and it's more than likely the perpetrator is Karla, Smiley's old adversary and his opposite number in Moscow.

Once, the distinctions were clear: the Circus handled all things political while the Department dealt with matters military. But over the years the power and influence had passed to the Circus. Now suddenly the department had a job on its hands. Uncertain evidence suggested Soviet missiles being put in place near the German border, while vital film had gone missing and a courier was dead.

The Berlin Wall is down, the Cold War is over, but the world's second oldest profession is very much alive. Smiley accepts an invitation to dine with the eager young men and women of the Circus' latest intake; and over coffee and brandy, by flickering firelight, he beguilingly offers them his personal thoughts on espionage past, present, and future. In doing so, he prompts one of his former Circus colleagues into a searching examination of his own eventful secret life.

George Smiley is one of the most brilliantly realised characters in British fiction. Bespectacled, tubby, eternally middle-aged, and deceptively ordinary, he has a mind like a steel trap and is said to possess 'the cunning of Satan and the conscience of a virgin'. Miss Ailsa Brimley is in a quandary. She's received a peculiar letter from Mrs Stella Rode, saying that she fears her husband – an assistant master at Carne School - is trying to kill her. Reluctant to go to the police, Miss Brimley calls upon her old wartime colleague, George Smiley.

Peter Guillam, staunch colleague and disciple of George Smiley of the British Secret Service, is living out his old age on the family farmstead in Brittany when a letter summons him to London. The reason? His Cold War past has come back to claim him. Intelligence operations that were once the toast of secret London and involved such characters as Alec Leamas, Jim Prideaux, George Smiley and Peter Guillam himself are to be scrutinised under disturbing criteria by a generation with no memory of the Cold War.

It is the third summer of perestroika. Niki Landau, philanderer and travelling rep, attends the first Moscow audio fair and is asked by beautiful young Katya to take a parcel back to England. It’s addressed to Barley Blair, jazz-player and drinker, and contains information vital to the defence of the West. But times and heroes are changing. And Barley Blair is a man who makes his own rules of engagement.

Magnus Pym, counsellor at the British Embassy in Vienna, has suddenly vanished, believed defected. The chase is on for a missing husband, a devoted father, and a life-time secret agent. Pym's life, it is revealed, is entirely made up of secrets. The race is on to find the perfect spy.

Alec Leamas has ended his time in Berlin. Or his time has ended him. The last of his Eastern agents has been killed, like the others, by the Abteilung. Back at the Circus, Leamas is put on the shelf. He turns to drunkenness and dishonesty and finally disappears from view, a seemingly broken man. But unknown to anyone except George Smiley and his master, Control, Leamas has been given his toughest mission ever. He will have to be himself but more so.

The British Embassy in Bonn is up in arms. Her Majesty's financially troubled government is seeking admission to Europe's Common Market just as anti-British factions are rising to power in Germany. Rioters are demanding reunification, and the last thing the Crown can afford is a scandal. Then Leo Harting - an embassy nobody - goes missing with a case full of confidential files. London sends Alan Turner to control the damage, but he soon realises that neither side really wants Leo found - alive.

At 48, Tim Cranmer is a secret servant in retirement, free to devote himself to his manor house, his vineyard and his young mistress, Emma. But a rival in love disappears with Emma, and Tim sets off in pursuit.

The night manager is Jonathan, a veteran of clandestine operations. In flight from a failed marriage and his own past, he has taken refuge in the luxury hotel trade. Yet he finds no escape from his demons. Driven by a desire for atonement and by an inherited patriotism, Jonathan allows himself to be recruited as a British secret agent with a mission to expose the murderer of the woman he himself betrayed. His odyssey takes him across Britain and Canada to the Caribbean and the jungles of Panama. But there are more treacherous jungles still in Whitehall and Washington.

Lured by Israeli intelligence into the world of espionage, Charlie, a young actress, is plunged into a deceptive and delicate trap to ensnare an elusive Palestinian terrorist.

A corporate lawyer from the House of Single & Single is shot dead on a Turkish hillside for crimes that he does not understand. A children’s entertainer in Devon is hauled to his local bank late at night to explain a monumental influx of cash. A Russian freighter is arrested in the Black Sea.... The logical connection of these events and more is one of the many pleasures of this story of love, deceit, family and the triumph of humanity.

Harry Pendel is the charismatic proprietor of Pendel and Braithwaite Limitada of Panama, through whose doors everyone who is anyone in Central America passes. Andrew Osnard, mysterious and fleshy, is a spy. His secret mission is two-pronged: to keep a watchful eye on the political manoeuvrings leading up to the American handover of the Panama Canal on 31st December 1999; and to secure for himself the immense private fortune that has until now churlishly eluded him.