Berlin, 1939. Before everything changed, Hannah Rosenthal lived a charmed life. But now the streets of Berlin are draped in ominous flags; her family’s fine possessions are hauled away; and they are no longer welcome in the places they once considered home. A glimmer of hope appears in the shape of the St. Louis, a transatlantic ocean liner promising Jews safe passage to Cuba. At first, the liner feels like a luxury, but as they travel, the circumstances of war change, and the ship that was to be their salvation seems likely to become their doom.

New York, 2014. On her twelfth birthday, Anna Rosen receives a mysterious package from an unknown relative in Cuba, her great-aunt Hannah. Its contents inspire Anna and her mother to travel to Havana to learn the truth about their family’s mysterious and tragic past.