Based upon the play A Sleeping Clergyman by James Bridie, it tells the story of three generations of the Scottish Cameron family, with its various conflicts and romances.

Poor New York shop girl Nadina receives the unexpected news that she is next in line to be queen of an Eastern European country. On her arrival in Ruritania, a revolution is in progress, and only minutes before her coronation, Nadina is forced into exile. She flees to Paris with her nurse, and then travels on to Switzerland. There Nadina encounters the Ruritanian revolutionary leader Carl, recuperating from the trials of revolution, and the couple unexpectedly fall in love. When the revolution collapses in Ruritania, they return and marry, thus forming a constitutional monarchy supported by all the people.

In the late 19th century, on board a ship sailing from Jamaica to England, Olivia Harwood, a recent widow, takes on the task of caring for several malaria patients, including Mark Bellis, a mysterious and tormented painter.

After hearing news that her officer husband has been killed in battle, Diana Wentworth forges a new life for herself, becoming an MP and learning to love again. Then, out of the blue comes the shattering news that her husband is not dead after all.

The theft of a famous painting leads to murder and many suspects on a plush train speeding from Paris to Rome.

Ivan Kouznetsoff, a Russian engineer, recounts during World War II his stay in England prior to the war working on a new propeller for ice-breaking ships. Naïve about British people and convinced by hearsay that they are shallow and hypocritical, Ivan is both bemused and amused by them. He is blunt in his opinions about Britons and at first this puts off his hosts, including the lovely Ann Tisdall, whose grandfather runs the shipbuilding firm that will make use of Ivan's propeller. The longer Ivan stays, however, the more he comes to understand the humor, warmth, strength, and conviction of the British people, and the more they come to see him as a friend rather than merely a suspicious Russian. As a romantic bond grows between Ivan and Ann, a cultural bond begins to grow as well, particularly as the war begins and Russia is attacked by Germany.

A teacher falls in love with the married owner of the guest house in which she is staying during a holiday to Austria.

After a chance train encounter with Laurence Knight, Tom Blake's family's fortunes prosper on the beneficence of the great financier. A developing friendship leads to the Knights selling their home to the Blakes when they move back to London. All looks rosy for the Blakes as share prices in Mr Knight's new business venture soar, but is their confidence misplaced?

P.C. George Dixon is a long-serving traditional copper who is due to retire shortly. He takes a new recruit under his aegis and introduces him to the easy-going night beat. Dixon is a classic ordinary hero but also anachronistic, unprepared and unable to answer the violence of the 1950s.

A clerk is suspected of committing a warehouse robbery and captures the real thieves aboard a pleasure boat.