London, 1940. Ruth, a young schoolteacher, volunteers as an escort helping to evacuate children from war-torn England to Australia and New Zealand. Her three-month voyage is fraught - their passage is perilous, and the children anxious and homesick. Nine-year-old Fergus is more troubled than most and Ruth forms an unexpected bond with the boy. It's not just Fergus who captures Ruth's attention. Bobby, a fellow volunteer who initially infuriates Ruth with his laidback charm, somehow gets under her skin and throws her ordered life into chaos. Tragedy strikes on their return voyage, when the Rangitane is attacked by German raiders. As the ship goes down, the surviving passengers are taken as prisoners of war aboard the German vessel. To the rest of the world, they are missing, presumed dead. New Zealand 2005. Hazel boards a plane to London, eager to explore Europe. Sitting next to her is a man named Joe. On her lap is a treasured book from her grandfather, Fergus. A book that will finally reveal Ruth's story. A captivating, heart-wrenching story of love, loss, and the resilience of the human spirit that will stay with you long after you turn the final page.