When her employment agency sends her to the wrong address, her life takes an unexpected turn. The alluring nightclub singer, Delysia LaFosse, becomes her new employer, and Miss Pettigrew encounters a kind of glamour that she had only met before at the movies. Over the course of a single day, both women are changed forever.

    Ruby Lennox begins narrating her life at the moment of conception, and from there takes us on a whirlwind tour of the twentieth century as seen through the eyes of an English girl determined to learn about her family and its secrets.