A beautiful temptress re-kindles an old romance while trying to escape her past during a tension-packed train journey.

Adrian Messenger, a famous writer, asks his friend Anthony Gethryn, a former British agent, to help him investigate the whereabouts of the people who appear on a list, without asking him the reason why he should do so.

A stuffy family man cheats on his wife but she refuses him a divorce at first. Meanwhile his mistress resents her second class status.

Boisterous gangster kingpin Bull Weed rehabilitates his former lawyer from his alcoholic haze, but complications arise when he falls for Weed's girlfriend.

Amy and Matthew Dale separate and they place their young son, Matthew Jr., in a London boarding school. The boy grows up without knowing his parents, and is taunted by his schoolmates, who doubt the legitimacy of his childhood. By the time he is 20, Matt wants to find out about his parentage, so he travels to Paris, leaving behind his sweetheart, Margo.

A police inspector 'solves' a crime that, in fact, may not have occurred at all.

Philip and Cynthia Grey are a pair of recently-wed Bostonians, and Cynthia is properly back-bay no-action quiet and dowdy, and Philip resigns himself to the quietness (no action) regularity of their home. But then along comes a blonde, Peggy Nash, who adds some action and outside-regularity to Philip's life. Cynthia is somewhat upset at this turn of events, and decides to go to Paris - the Wickedest City in the World - and get a quiet divorce. Cynthia soon finds out that Paris is a really gay city, especially after Henri de Briac, shows up and offers to be her guide to the delights of Paris (primarily him). Cynthia quickly sheds some of her dowdy ways and dowdy clothes, and is having herself what was once quaintly described as a gay old time. Philip then shows up in Paris, deciding he wants Cynthia back as his wife, and Peggy shows up right behind him and, soon, it is up to Henri to make the pairing-arrangements for the foursome.

Christine weds Stuart Knight only to discover he prefers the high life to married life. When Dr. Alan Monteagle comes along, Christine is drawn to him. But, still determined to stick to her wedding vows, she runs from him, only to get in a car accident with her husband, who happened to be riding by with one of his floozies.

The refined Lady Isabel Carlisle, after leaving her family and enduring nearly a decade of hardships, learns that her son has fallen ill. Despite being nearly blinded as the result of an explosion, she returns home to see her son again.

A cavalcade of English life from New Year's Eve 1899 until 1933 is seen through the eyes of well-to-do Londoners Jane and Robert Marryot. Amongst events touching their family are the Boer War, the death of Queen Victoria, the sinking of the Titanic, and the Great War.