Three
cities, two sisters, one chance to correct the past . . .

New York, 1937: When estranged sisters Clara and Madeleine
Sommers learn their grandmother is dying, they agree to fulfill her last wish:
to travel across Europe—together. They are to deliver three letters, in which
Violet will say goodbye to those she hasn’t seen since traveling to Europe
forty years earlier; a journey inspired by famed reporter, Nellie Bly.

Clara, ever-dutiful, sees the trip as an inconvenient detour
before her wedding to millionaire Charles Hancock, but it’s also a chance to
embrace her love of art. Budding journalist Madeleine relishes the opportunity
to develop her ambitions to report on the growing threat of Hitler’s Nazi party
and Mussolini’s control in Italy.

Constantly at odds with each other as they explore the
luxurious Queen Mary, the Orient Express, and the sights of Paris and  Venice,, Clara and Madeleine wonder if they can fulfil Violet’s wish, until
a shocking truth about their family brings them closer together. But as they
reach Vienna to deliver the final letter, old grudges threaten their
reconciliation again. As political tensions rise, and Europe feels increasingly
volatile, the pair are glad to head home on the Hindenburg, where fate
will play its hand in the final stage of their journey.