Things are looking up in Riverford, Texas, in June 1898. Czech immigrant, Sarah Novak, is finally graduating from teacher's college. Surely she will now put aside all that foolishness about being a professional woman and marry Lee Logan. After all, what young woman could ask for more? Lee is a handsome, young banker who will take his new bride off to bustling Fort Worth, Texas, and give her a life of luxury.

Rome, 1943. With the fall of Italy’s Fascist government and the Nazi regime occupying the streets of Rome, British ballerina Julia Bradbury is stranded and forced to take refuge at a hospital on Tiber Island. But when she learns of a deadly sickness sweeping through the quarantine wards—a fake disease known only as Syndrome K—she is drawn into one of the greatest cons in history. Alongside hospital staff, friars of the adjoining church, and two Allied medics, Julia risks everything to rescue Jewish Italians from the deadly clutches of the Holocaust.

Sixteen-year-old Lorena Leland’s dreams of a rich and fulfilling life as a writer are dashed when the stock market crashes in 1929. Seven years into the Great Depression, Rena’s banker father has retreated into the bottle, her sister is married to a lazy charlatan and gambler, and Rena is an unemployed newspaper reporter. Eager for any writing job, Rena accepts a position interviewing former slaves for the Federal Writers’ Project. There, she meets Frankie Washington, a 101-year-old woman whose honest yet tragic past captivates Rena.

Seven years ago, a letter left inside a tree brought Laura Bradshaw an anonymous friend who helped her navigate the tragic loss of her mother and gave her something to look forward to despite the overbearing hand of her father. Life would be far bleaker, if not for her beloved Letter Tree, her dear friend, and her secret trips to the Buffalo Zoo. But even these rays of light are threatened when her father decides to play matchmaker in order to further his business goals.

Vienna, 1954 After losing everyone she loves in the final days of World War II, Ingrid Bauer agrees to a hasty marriage with a gentle Soviet embassy worker and follows him home to Moscow. But nothing within the Soviet Union’s totalitarian regime is what it seems, including her new husband, whom Ingrid suspects works for the KGB. Inspired by her daughter’s birth, Ingrid risks everything and reaches out in hope to the one country she understands and trusts—Britain, the country of her mother’s birth. She begins passing intelligence to MI6, navigating a world of secrets and lies, light and shadow.