Five-year-old Beatrix looks on in horror as a soldier forces her mother off the tram. It is 1942 in Amsterdam, and everyone knows what happens to Jews who are taken away by the Nazis. The soldier turns his attention to Beatrix, when suddenly, the ticket-taker, Lars Gorter, blurts out that she is his niece. With his brother Hans, the tram conductor, they manage to rescue the child from the same fate as her mother. The two elderly brothers realize that they are now in charge of the little girl. They are at a loss -- after all, neither one has ever married, let alone has children. They know that harbouring a Jew could cost them their lives, but in desperation, they turn to a neighbour, Mrs. Vos, for help.