The year is 1931. The new and luxurious transatlantic liner Empress of Britain is on her eastward passage. Among the first-class passengers on board are two English confidence tricksters, making a discreet exit from a little awkwardness they have left behind them in the United States.

It is January 1721. London is reeling from the effects of the greatest financial scandal of the age, the collapse of the South Sea Bubble. William Spandrel, a penniless mapmaker, is offered a discharge of his debts by his principal creditor, Sir Theodore Janssen, a director of the South Sea Company, on one condition: he must secretly convey an important package to a friend of Janssen's, Ysbrand de Vries, in Amsterdam.

On a mild autumn afternoon in 1882, William Trenchard sits smoking his pipe in the garden of his comfortable family home. When the creak of the garden gate heralds the arrival of an unexpected stranger, he is puzzled but not alarmed. He cannot know the destruction this man will wreak on all he holds most dear.

On assignment in Vienna, photographer Ian Jarrett falls suddenly and desperately in love with a woman he meets by pure chance, Marian Esguard. Back in England, he separates from his wife and goes to meet Marian at an agreed rendezvous, only to hear her tell him on the telephone that she will not, after all, be coming. Then she vanishes from his life as mysteriously as she entered it. Who and where is the woman he met and fell in love with in Vienna?

Recovering from the recent tragedy of his wife's death in a cliff fall, Tony Sheridan goes to stay with his sister-in-law, Lucy, and her husband at their new home - Otherways - a strange circular, moated house. Disturbed by memories of his wife and a growing attraction to Lucy, Sheridan is also troubled by weird and vivid dreams. And as he and Lucy embark on a secret and passionate affair, Sheridan begins uncovering the truth about Otherways.

What value can be put on a human mind? How Joe Roberts does what he does is a mystery. He has a brain that seems able to outperform a computer. To a games company like Venstrom that promises big profits if his abilities can be properly exploited. So they send Nicole Nevinson to track him down and make him an offer too good to refuse.

Why should distinguished Edwardian Cabinet minister Edwin Straford resign at the height of his career? Why does the woman he loves so suddenly reject him? Why, 70 years later, should people go to such lengths to prevent the truth coming out?

Four years of horrific fighting have finally ended on the battlefield, but in the spring of 1919, Paris is filled with delegates from around the world who are still trying to hammer out the terms of peace. One such delegate is British diplomat Sir Henry Maxted, in charge of liaising with Brazilians regarding seized ships. But before a deal is reached, Sir Henry turns up dead outside a Montparnasse apartment building, apparently having fell from the roof.

The story opens with the apparently accidental drowning of a sixth form student in the Norfolk countryside. As a matter of routine, or so it seems, the case passes across the desk of Detective Sergeant Smith, recently returned to work after an internal investigation into another case that has led to tensions between officers at Kings Lake police headquarters. As an ex-DCI, Smith could have retired by now, and it is clear that some of his superiors wish that he would do so.

Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.