In the aftermath of World War II, Germany was occupied by Allied forces, and amidst the devastation, trains became a refuge for homeless children, known as Displaced Persons, who had survived the horrors of the war. These children, cared for by Mrs. Murray and other UNRRA (United Nations Relief and Rehabilitation Administration) workers, were transported to a transit camp where they received shelter, food, and safety. The process of rebuilding their lives was complex and emotionally taxing, as officials worked tirelessly to identify each child and reunite them with surviving family members whenever possible.
One of the central characters is a young boy named Karel, who responds with an unchanging "Ich weiß nicht" ("I don't know") to all questions posed to him. His background is touched with tragedy—born into a privileged Czech family, his life was torn apart when Nazis deported his sister and their father, a doctor. Karel and his mother were sent to a concentration camp, where Karel bears a tattoo, number A24328, with an implied connection to Auschwitz, indicated by the "A" in his tattoo. Separated from his family, Karel survived by scavenging for food alongside other orphaned children, constantly living in fear of discovery and death.
The following day, Karel and other children are loaded into trucks and ambulances, a journey filled with dread because of the Nazis' history of using ambulances for killings through poison gas. The children, initially terrified, are overwhelmed by the strong smell of exhaust fumes inside the vehicles. In a harrowing moment, Raoul, a friend of Karel's, opens the back door of the ambulance, causing panic among the children as they scatter. In an attempt to escape, Karel and Raoul try to swim across a river; tragedy strikes when Raoul drowns, while Karel manages to hide himself in the reeds, narrowly escaping.
Simultaneously, a parallel story unfolds involving Mrs. Malik, Karel's mother, who is fervently searching for her son. She reaches a camp where she believes Karel might be, only to discover it is a Jewish boy who had adopted the name Karel Malik after it was unclaimed during a roll call, fearing retribution if recognized as Jewish. Despite her efforts, she learns from Mrs. Murray's camp that her son has drowned, intensifying her despair.
Meanwhile, Karel encounters Steve, a compassionate United States Army engineer. Recognizing that the boy cannot remember his own name, Steve begins calling him Jim and takes on the responsibility of caring for him. Steve teaches Jim English and gradually begins the long process of planning to bring him to America, dreaming of giving him a fresh start away from the horrors he endured.
As Karel's memories slowly resurface, he starts recalling the last time he saw his mother behind a fence in the concentration camp. In his confused and determined state, he runs away one evening, mistaking a factory fence for that of the camp. Despite his efforts to locate her, he cannot find her among the workers returning home. When Steve finds Karel, he painfully informs him that his mother is dead, most likely gassed upon arriving at Auschwitz. Despite this, Steve shares his desire to adopt Karel and take him to America to live a better life.
Back at the camp, Mrs. Malik continues working alongside Mrs. Murray but eventually resigns in her relentless search for her son. Mrs. Murray pleads for her to stay, recognizing her kindness and connection with the children.
The day comes when Steve takes Karel to say goodbye at the UNRRA camp before heading to America. Hoping to have his paperwork processed and to keep Karel safe, Steve plans to send for him later. As Mrs. Murray reflects on the boy, she suspects that Jim might be Karel, and in her haste to reunite them, she departs for the train station, only to find that her train has already left. Just then, she notices Mrs. Malik walking toward her with a group of displaced children arriving on a train. Seeing this, she changes her mind, sees Karel’s mother, and decides to stay.
In the poignant final moments, as the children are assembled at the camp, Mrs. Malik calls out to Karel, and the boy, momentarily unsure, recognizes his mother. Their emotional reunion plays out as Mrs. Murray and Steve observe quietly, witnessing a powerful moment of hope and kinship amid the aftermath of destruction and loss.
> "Sometimes you have to hold on to hope, even when everything seems lost."
